CVE-2016-1287

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekWeaponized

Also known asEUVD-2016-2386 (ENISA EUVD) · GHSA-8657-w7wc-ccqj (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationNo fix on record since 2016: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 74%
  • Public exploit code is available (Exploit-DB, marked verified by Exploit-DB, other public proof-of-concept code)
CISA-KEV: Not listedEPSS PROB: 74%CVSS: 9.8Exploit: Exploit-DB (verified) · other public PoCExposed services: Not assessed

No fix has been recorded since the CVE record was published in 2016 — use a compensating control (WAF / firewall / segmentation) and check the vendor's advisory.

The CVE record's description, written by its CNA (Cisco Systems, Inc.), states the affected versions: "Buffer overflow in the IKEv1 and IKEv2 implementations in Cisco ASA Software before 8.4(7.30), 8.7 before 8.7(1.18), 9.0 before 9.0(4.38), 9.1 before 9.1(7), 9.2 before 9.2(4.5), 9.3 before 9.3(3.7), 9.4 before 9.4(2.4)…" No release containing a fix is confirmed on record.

Buffer overflow in the IKEv1 and IKEv2 implementations in Cisco ASA Software before 8.4(7.30), 8.7 before 8.7(1.18), 9.0 before 9.0(4.38), 9.1 before 9.1(7), 9.2 before 9.2(4.5), 9.3 before 9.3(3.7), 9.4 before 9.4(2.4), and 9.5 before 9.5(2.2) on ASA 5500 devices, ASA 5500-X devices, ASA Services Module for Cisco Catalyst 6500 and Cisco 7600 devices, ASA 1000V devices, Adaptive Security Virtual Appliance (aka ASAv), Firepower 9300 ASA Security Module, and ISA 3000 devices allows remote attackers to execute arbitrary code or cause a denial of service (device reload) via crafted UDP packets, aka Bug IDs CSCux29978 and CSCux42019.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
74
EG Risk 74/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation74% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 2016. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
74%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
74% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix has been recorded since the CVE record was published in 2016. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

February 11, 2016

Last Modified

June 17, 2026

Advisory Details (6)

Auto-updated Oct 7, 2026
No fix on record since 2016. Sources: cert.
Web page

Execute My Packet - Exodus Intelligence

https://blog.exodusintel.com/2016/02/10/firewall-hacking/
Web page

Cisco ASA Software IKEv1 and IKEv2 Buffer Overflow Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160210-asa-ike
CERT

VU#327976 - Cisco Adaptive Security Appliance (ASA) IKEv1 and IKEv2 contains a buffer overflow vulnerability

https://www.kb.cert.org/vuls/id/327976
Web page

Cisco ASA Software 8.x/9.x - IKEv1 / IKEv2 Buffer Overflow - Hardware remote Exploit

https://www.exploit-db.com/exploits/39823/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 57× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 146 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 50 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 05:52 UTCEG score recompute
  2. 2026-11-02 05:52 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-01 05:08 UTCEG score recompute
  4. 2026-11-01 05:08 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-31 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  6. 2026-10-31 04:25 UTCEG score recompute
  7. 2026-10-31 04:25 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-30 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  9. 2026-10-30 03:42 UTCEG score recompute
  10. 2026-10-30 03:42 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-29 02:59 UTCEG score recompute
  12. 2026-10-29 02:59 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-28 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  14. 2026-10-28 02:16 UTCEG score recompute
  15. 2026-10-28 02:16 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-27 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  17. 2026-10-27 01:31 UTCEG score recompute
  18. 2026-10-27 01:30 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-25 20:52 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-25 19:49 UTCEG score recompute
  21. 2026-10-25 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  22. 2026-10-24 20:09 UTCEG score recompute
  23. 2026-10-24 20:09 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-24 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  25. 2026-10-23 19:26 UTCEG score recompute
Show 71 more
  1. 2026-10-23 19:26 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-22 18:39 UTCEG score recompute
  3. 2026-10-22 18:38 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-21 17:53 UTCEG score recompute
  5. 2026-10-21 17:53 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-21 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  7. 2026-10-20 17:10 UTCEG score recompute
  8. 2026-10-20 17:10 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-19 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  10. 2026-10-19 16:23 UTCEG score recompute
  11. 2026-10-19 16:23 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-18 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  13. 2026-10-18 15:36 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-18 10:54 UTCEG score recompute
  15. 2026-10-17 14:53 UTCEG score recompute
  16. 2026-10-17 14:53 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-16 14:09 UTCEG score recompute
  18. 2026-10-16 14:09 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-15 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  20. 2026-10-15 13:19 UTCEG score recompute
  21. 2026-10-15 13:18 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-14 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  23. 2026-10-14 08:23 UTCEG score recompute
  24. 2026-10-14 08:23 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-13 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  26. 2026-10-13 03:39 UTCGHSA enrichmentGHSA-8657-w7wc-ccqj · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-12 20:45 UTCEG score recompute
  28. 2026-10-12 01:09 UTCEG score recompute
  29. 2026-10-10 19:54 UTCEPSS rescoreEPSS 74% · 99th percentile
  30. 2026-10-08 16:35 UTCEPSS rescoreEPSS 74% · 99th percentile
  31. 2026-10-07 23:40 UTCEPSS rescoreEPSS 74% · 99th percentile
  32. 2026-10-05 17:38 UTCEPSS rescoreEPSS 74% · 99th percentile
  33. 2026-10-01 19:43 UTCEPSS rescoreEPSS 74% · 99th percentile
  34. 2026-09-30 09:11 UTCEG score recompute
  35. 2026-09-26 15:53 UTCEPSS rescoreEPSS 74% · 99th percentile
  36. 2026-09-24 13:59 UTCEPSS rescoreEPSS 74% · 99th percentile
  37. 2026-09-19 15:35 UTCEPSS rescoreEPSS 75% · 99th percentile
  38. 2026-09-18 19:22 UTCEPSS rescoreEPSS 75% · 99th percentile
  39. 2026-09-17 19:21 UTCEPSS rescoreEPSS 75% · 99th percentile
  40. 2026-09-15 03:05 UTCEPSS rescoreEPSS 75% · 99th percentile
  41. 2026-09-13 16:41 UTCEPSS rescoreEPSS 75% · 99th percentile
  42. 2026-09-12 14:55 UTCEPSS rescoreEPSS 77% · 99th percentile
  43. 2026-09-10 09:26 UTCEPSS rescoreEPSS 77% · 99th percentile
  44. 2026-09-07 15:56 UTCEPSS rescoreEPSS 77% · 99th percentile
  45. 2026-09-04 13:56 UTCEPSS rescoreEPSS 77% · 99th percentile
  46. 2026-08-30 19:12 UTCEPSS rescoreEPSS 77% · 99th percentile
  47. 2026-08-26 14:41 UTCEPSS rescoreEPSS 77% · 99th percentile
  48. 2026-08-25 13:44 UTCEPSS rescoreEPSS 77% · 99th percentile
  49. 2026-08-21 23:44 UTCEPSS rescoreEPSS 77% · 99th percentile
  50. 2026-08-19 16:59 UTCEPSS rescoreEPSS 77% · 99th percentile
  51. 2026-08-16 14:51 UTCEPSS rescoreEPSS 77% · 99th percentile
  52. 2026-08-16 02:09 UTCEPSS rescoreEPSS 77% · 99th percentile
  53. 2026-08-15 01:25 UTCEPSS rescoreEPSS 77% · 99th percentile
  54. 2026-08-12 13:46 UTCEPSS rescoreEPSS 77% · 99th percentile
  55. 2026-08-11 13:36 UTCEPSS rescoreEPSS 77% · 99th percentile
  56. 2026-08-05 19:12 UTCEPSS rescoreEPSS 77% · 99th percentile
  57. 2026-08-04 10:32 UTCEPSS rescoreEPSS 77% · 99th percentile
  58. 2026-08-02 02:22 UTCEPSS rescoreEPSS 77% · 99th percentile
  59. 2026-08-01 04:11 UTCEPSS rescoreEPSS 77% · 99th percentile
  60. 2026-07-30 01:26 UTCEPSS rescoreEPSS 77% · 99th percentile
  61. 2026-07-26 14:50 UTCEPSS rescoreEPSS 77% · 99th percentile
  62. 2026-07-25 14:13 UTCEPSS rescoreEPSS 77% · 99th percentile
  63. 2026-07-23 01:21 UTCEG score recompute
  64. 2026-07-22 22:01 UTCEG score recompute
  65. 2026-07-22 14:04 UTCEPSS rescoreEPSS 77% · 99th percentile
  66. 2026-07-21 15:21 UTCEPSS rescoreEPSS 77% · 99th percentile
  67. 2026-07-15 16:54 UTCEPSS rescoreEPSS 77% · 99th percentile
  68. 2026-07-13 22:26 UTCEPSS rescoreEPSS 77% · 99th percentile
  69. 2026-07-12 05:43 UTCEPSS rescoreEPSS 77% · 99th percentile
  70. 2026-07-11 08:23 UTCEPSS rescoreEPSS 77% · 99th percentile
  71. 2026-07-08 15:10 UTCEPSS rescoreEPSS 77% · 99th percentile

Publicly available exploits

(3 references)

Public exploit code is referenced for this CVE (1 Exploit-DB entry, 2 GitHub PoCs). No fix has been recorded since the CVE record was published in 2016. If the vendor still supports the product, apply the fixed version it names; if it no longer does, isolate the affected system.

  • Exploit-DBEDB-39823✓ verified
    Published May 17, 2016

    Cisco ASA Software 8.x/9.x - IKEv1 / IKEv2 Buffer Overflow

    Open source ↗
  • GitHub PoCNetSPI/asa_tools
    Published Sep 8, 2016

    Verification tools for CVE-2016-1287

    Open source ↗
  • GitHub PoCjgajek/killasa
    Published Feb 15, 2016

    CVE-2016-1287 vulnerability test

    Open source ↗

Frequently asked(5)

What is CVE-2016-1287?
CVE-2016-1287 is a critical-severity vulnerability; its CVE record was published on February 11, 2016. Buffer overflow in the IKEv1 and IKEv2 implementations in Cisco ASA Software before 8.4(7.30), 8.7 before 8.7(1.18), 9.0 before 9.0(4.38), 9.1 before 9.1(7), 9.2 before 9.2(4.5), 9.3 before 9.3(3.7), 9.4 before 9.4(2.4), and 9.5 before 9.5(2.2) on ASA 5500 devices, ASA 5500-X devices, ASA Services…
When was CVE-2016-1287 made public?
CVE-2016-1287 was made public on February 10, 2016: that is the date its CVE record's CNA, Cisco Systems, Inc., gives for when the vulnerability was made public. The CVE record itself was published on February 11, 2016. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2016-1287 actively exploited?
CVE-2016-1287 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: Exploit-DB marks a public exploit for it as verified. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 74% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-1287?
CVE-2016-1287 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-1287?
No fix for CVE-2016-1287 has been recorded since its CVE record was published in 2016. Restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and check the vendor's advisory for a fix. The CVE record's description, written by its CNA (Cisco Systems, Inc.), states the affected versions: "Buffer overflow in the IKEv1 and IKEv2 implementations in Cisco ASA Software before 8.4(7.30), 8.7 before 8.7(1.18), 9.0 before 9.0(4.38), 9.1 before 9.1(7), 9.2 before 9.2(4.5), 9.3 before 9.3(3.7), 9.4 before 9.4(2.4)…" No release containing a fix is confirmed on record.

Dependency Blast Radius

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