CVE-2026-72712

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-08-11. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-56821 (ENISA EUVD) · GHSA-7j7x-fg87-hwwg (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate objects in an infinite loop, causing an out-of-memory condition that results in application crash.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

August 11, 2026

Last Modified

October 24, 2026

Advisory Details (4)

Auto-updated Aug 11, 2026
Patch available. Sources: github_commit.
Web page

Nmap 7.99 Denial of Service via Zero-Length TCP Option Packet | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nmap-denial-of-service-via-zero-length-tcp-option-packet
Web page

Packet:parse_options() in nselib/packet.lua allows uncontrolled memory consumption (DoS) · Issue #3368 · nmap/nmap · GitHub

https://github.com/nmap/nmap/issues/3368
GitHub commit

commit 7ef4ee030a00 (nmap/nmap)

Fix landed in nmap/nmap commit 7ef4ee030a00 — awaiting tagged release

https://github.com/nmap/nmap/commit/7ef4ee030a0023fe22616387a000032e1a678b6a
Web page

GitHub - nmap/nmap: Nmap - the Network Mapper. Github mirror of official SVN repository. · GitHub

https://github.com/nmap/nmap

Vendor Advisories for CVE-2026-72712(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nmap7.93+dfsg1-1 ... 7.99+dfsg-2 (20 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nmap7.95+dfsg-3, 7.98+dfsg-1, 7.98+dfsg-1~bpo13+1, 7.99+dfsg-1, 7.99+dfsg-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nmap7.95+dfsg-3, 7.98+dfsg-1, 7.98+dfsg-1~bpo13+1, 7.99+dfsg-1, 7.99+dfsg-2
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 52× 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 100 of 237 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. None are among the latest 100 rows. The 137 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-29 16:58 UTCEG score recompute
  5. 2026-10-29 16:58 UTCVendor advisory
  6. 2026-10-29 16:58 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  7. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-25 14:06 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-24 15:29 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  15. 2026-10-23 21:32 UTCEG score recompute
  16. 2026-10-23 21:32 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-10-22 19:22 UTCEG score recompute
  19. 2026-10-22 19:22 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-10-18 03:15 UTCEG score recompute
Show 75 more
  1. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-12 15:41 UTCEG score recompute
  8. 2026-10-11 19:27 UTCEG score recompute
  9. 2026-10-11 16:42 UTCEG score recompute
  10. 2026-10-11 14:02 UTCEG score recompute
  11. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-06 17:39 UTCEG score recompute
  17. 2026-10-06 17:39 UTCVendor advisory
  18. 2026-10-06 17:39 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-10-04 22:36 UTCVendor advisory
  23. 2026-10-04 22:36 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  24. 2026-10-03 20:31 UTCEG score recompute
  25. 2026-10-03 20:31 UTCVendor advisory
  26. 2026-10-03 20:31 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  27. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  28. 2026-10-02 08:29 UTCEG score recompute
  29. 2026-10-02 08:29 UTCVendor advisory
  30. 2026-10-02 08:29 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  31. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  32. 2026-09-30 22:04 UTCEG score recompute
  33. 2026-09-30 22:04 UTCVendor advisory
  34. 2026-09-30 22:04 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  35. 2026-09-29 08:20 UTCEG score recompute
  36. 2026-09-29 08:20 UTCVendor advisory
  37. 2026-09-29 08:20 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  38. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  39. 2026-09-28 09:10 UTCEG score recompute
  40. 2026-09-28 09:10 UTCVendor advisory
  41. 2026-09-28 09:10 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  42. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  43. 2026-09-27 10:02 UTCEG score recompute
  44. 2026-09-27 10:02 UTCVendor advisory
  45. 2026-09-27 10:02 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  47. 2026-09-24 20:35 UTCEG score recompute
  48. 2026-09-24 20:35 UTCVendor advisory
  49. 2026-09-24 20:35 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  50. 2026-09-23 20:57 UTCEG score recompute
  51. 2026-09-23 20:57 UTCVendor advisory
  52. 2026-09-23 20:57 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  53. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  54. 2026-09-22 21:10 UTCEG score recompute
  55. 2026-09-22 21:10 UTCVendor advisory
  56. 2026-09-22 21:10 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  57. 2026-09-21 21:51 UTCEG score recompute
  58. 2026-09-21 21:51 UTCVendor advisory
  59. 2026-09-21 21:51 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  60. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  61. 2026-09-20 22:38 UTCEG score recompute
  62. 2026-09-20 22:38 UTCVendor advisory
  63. 2026-09-20 22:38 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  64. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  65. 2026-09-19 23:12 UTCEG score recompute
  66. 2026-09-19 23:12 UTCVendor advisory
  67. 2026-09-19 23:12 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  68. 2026-09-18 23:51 UTCEG score recompute
  69. 2026-09-18 23:51 UTCVendor advisory
  70. 2026-09-18 23:51 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  71. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  72. 2026-09-18 00:36 UTCEG score recompute
  73. 2026-09-18 00:36 UTCVendor advisory
  74. 2026-09-18 00:36 UTCGHSA enrichmentGHSA-7j7x-fg87-hwwg · GitHub CVSS 6.5
  75. 2026-09-17 00:42 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-72712?
CVE-2026-72712 is a medium-severity vulnerability; its CVE record was published on August 11, 2026. Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate…
When was CVE-2026-72712 made public?
CVE-2026-72712 was made public on August 11, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 11, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-72712 actively exploited?
CVE-2026-72712 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72712?
CVE-2026-72712 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72712?
A fix for CVE-2026-72712 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72712 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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