CVE-2015-2808

CRITICALNVD 3.710.0
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 10.0 from GitHub Security Advisory (severity: MODERATE) published 2022-05-13. NVD baseline CVSS 3.7; sources differ by 6.3.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated

Also known asEUVD-2015-2896 (ENISA EUVD) · GHSA-jcj6-c96p-jcmm (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 74%
CISA-KEV: Not listedEPSS PROB: 74%CVSS: 3.7Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic that occasionally relies on keys affected by the Invariance Weakness, and then using a brute-force approach involving LSB values, aka the "Bar Mitzvah" issue.

CVSS v3
3.7
EG Score
10.0CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 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 SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 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 2026-10-31). 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 every mission impact level.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 every mission impact level.

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

Exploitation none (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

April 1, 2015

Last Modified

May 28, 2026

Patch Availability(14)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 3 ecosystems)
Debian:7(2)
PackageVulnerable rangeFix by version rangeDependents
openjdk-66b27-1.12.5-1 ... 6b36-1.13.8-1~deb6u1 (32 versions)
  • every version up to 6b36-1.13.8-1~deb7u1: fixed in 6b36-1.13.8-1~deb7u1
—
openjdk-77u13-2.3.6-1 ... 7u9-2.3.5~pre1-1 (66 versions)
  • every version up to 7u79-2.5.6-1~deb7u1: fixed in 7u79-2.5.6-1~deb7u1
—
Debian:6.0(1)
PackageVulnerable rangeFix by version rangeDependents
openjdk-66b18-1.8.10-0+squeeze1 ... 6b35-1.13.7-1~deb7u1 (102 versions)
  • every version up to 6b36-1.13.8-1~deb6u1: fixed in 6b36-1.13.8-1~deb6u1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
openjdk-77u75-2.5.4-2 ... 7u79-2.5.6-1~deb7u1 (6 versions)
  • every version up to 7u79-2.5.6-1~deb8u1: fixed in 7u79-2.5.6-1~deb8u1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 21× in last 7d / 71× 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 99 of 169 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 70 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 12:08 UTCEG score recompute
  2. 2026-11-01 12:08 UTCVendor advisory
  3. 2026-11-01 12:08 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub severity MODERATE · GitHub CVSS 10.0
  4. 2026-10-31 10:28 UTCEG score recompute
  5. 2026-10-31 10:28 UTCVendor advisory
  6. 2026-10-31 10:28 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  7. 2026-10-30 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  8. 2026-10-30 08:49 UTCEG score recompute
  9. 2026-10-30 08:49 UTCVendor advisory
  10. 2026-10-30 08:49 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  11. 2026-10-29 07:11 UTCEG score recompute
  12. 2026-10-29 07:11 UTCVendor advisory
  13. 2026-10-29 07:11 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  14. 2026-10-28 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  15. 2026-10-28 05:31 UTCEG score recompute
  16. 2026-10-28 05:31 UTCVendor advisory
  17. 2026-10-28 05:31 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  18. 2026-10-27 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  19. 2026-10-27 03:53 UTCEG score recompute
  20. 2026-10-27 03:53 UTCVendor advisory
  21. 2026-10-27 03:53 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  22. 2026-10-25 21:59 UTCVendor advisory
  23. 2026-10-25 21:59 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  24. 2026-10-25 19:55 UTCEG score recompute
  25. 2026-10-25 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
Show 74 more
  1. 2026-10-24 20:18 UTCEG score recompute
  2. 2026-10-24 20:18 UTCVendor advisory
  3. 2026-10-24 20:18 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  4. 2026-10-23 18:39 UTCEG score recompute
  5. 2026-10-23 18:39 UTCVendor advisory
  6. 2026-10-23 18:39 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  7. 2026-10-22 16:56 UTCEG score recompute
  8. 2026-10-22 16:56 UTCVendor advisory
  9. 2026-10-22 16:56 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  10. 2026-10-21 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  11. 2026-10-21 15:16 UTCEG score recompute
  12. 2026-10-21 15:16 UTCVendor advisory
  13. 2026-10-21 15:16 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  14. 2026-10-20 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  15. 2026-10-20 13:37 UTCEG score recompute
  16. 2026-10-20 13:37 UTCVendor advisory
  17. 2026-10-20 13:37 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  18. 2026-10-19 11:56 UTCEG score recompute
  19. 2026-10-19 11:56 UTCVendor advisory
  20. 2026-10-19 11:56 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  21. 2026-10-18 10:02 UTCEG score recompute
  22. 2026-10-18 10:02 UTCVendor advisory
  23. 2026-10-18 10:01 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  24. 2026-10-17 08:22 UTCEG score recompute
  25. 2026-10-17 08:22 UTCVendor advisory
  26. 2026-10-17 08:22 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  27. 2026-10-16 06:43 UTCEG score recompute
  28. 2026-10-16 06:43 UTCVendor advisory
  29. 2026-10-16 06:43 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  30. 2026-10-15 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  31. 2026-10-15 05:03 UTCEG score recompute
  32. 2026-10-15 05:03 UTCVendor advisory
  33. 2026-10-15 05:02 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  34. 2026-10-14 16:27 UTCEPSS rescoreEPSS 74% · 99th percentile
  35. 2026-10-14 00:50 UTCEG score recompute
  36. 2026-10-14 00:50 UTCVendor advisory
  37. 2026-10-14 00:50 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  38. 2026-10-13 16:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  39. 2026-10-12 20:54 UTCEG score recompute
  40. 2026-10-12 20:54 UTCVendor advisory
  41. 2026-10-12 20:54 UTCGHSA enrichmentGHSA-jcj6-c96p-jcmm · GitHub CVSS 10.0
  42. 2026-10-12 01:16 UTCEG score recompute
  43. 2026-10-10 19:54 UTCEPSS rescoreEPSS 74% · 99th percentile
  44. 2026-10-07 23:40 UTCEPSS rescoreEPSS 74% · 99th percentile
  45. 2026-10-06 15:11 UTCEPSS rescoreEPSS 74% · 99th percentile
  46. 2026-10-03 14:21 UTCEPSS rescoreEPSS 74% · 99th percentile
  47. 2026-09-30 14:58 UTCEPSS rescoreEPSS 74% · 99th percentile
  48. 2026-09-30 09:03 UTCEG score recompute
  49. 2026-09-27 13:40 UTCEPSS rescoreEPSS 74% · 99th percentile
  50. 2026-09-18 19:22 UTCEPSS rescoreEPSS 74% · 99th percentile
  51. 2026-09-17 19:21 UTCEPSS rescoreEPSS 74% · 99th percentile
  52. 2026-09-12 14:55 UTCEPSS rescoreEPSS 74% · 99th percentile
  53. 2026-09-11 09:31 UTCEPSS rescoreEPSS 74% · 99th percentile
  54. 2026-09-10 09:26 UTCEPSS rescoreEPSS 74% · 99th percentile
  55. 2026-09-06 13:42 UTCEPSS rescoreEPSS 74% · 99th percentile
  56. 2026-09-05 15:23 UTCEPSS rescoreEPSS 74% · 99th percentile
  57. 2026-09-04 13:55 UTCEPSS rescoreEPSS 74% · 99th percentile
  58. 2026-09-02 14:07 UTCEPSS rescoreEPSS 74% · 99th percentile
  59. 2026-08-30 19:12 UTCEPSS rescoreEPSS 74% · 99th percentile
  60. 2026-08-26 14:41 UTCEPSS rescoreEPSS 74% · 99th percentile
  61. 2026-08-21 23:44 UTCEPSS rescoreEPSS 74% · 99th percentile
  62. 2026-08-19 16:59 UTCEPSS rescoreEPSS 74% · 99th percentile
  63. 2026-08-16 02:09 UTCEPSS rescoreEPSS 74% · 99th percentile
  64. 2026-08-15 01:25 UTCEPSS rescoreEPSS 74% · 99th percentile
  65. 2026-08-12 13:46 UTCEPSS rescoreEPSS 74% · 99th percentile
  66. 2026-08-09 13:42 UTCEPSS rescoreEPSS 74% · 99th percentile
  67. 2026-08-07 16:22 UTCEPSS rescoreEPSS 74% · 99th percentile
  68. 2026-08-05 19:12 UTCEPSS rescoreEPSS 74% · 99th percentile
  69. 2026-07-30 16:23 UTCEPSS rescoreEPSS 74% · 99th percentile
  70. 2026-07-28 15:31 UTCEPSS rescoreEPSS 74% · 99th percentile
  71. 2026-07-24 14:13 UTCEPSS rescoreEPSS 74% · 99th percentile
  72. 2026-07-23 01:17 UTCEG score recompute
  73. 2026-07-23 00:19 UTCEG score recompute
  74. 2026-07-22 21:58 UTCEG score recompute

Frequently asked(5)

What is CVE-2015-2808?
CVE-2015-2808 is a critical-severity vulnerability; its CVE record was published on April 1, 2015. The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic…
When was CVE-2015-2808 made public?
CVE-2015-2808 was made public on March 26, 2015: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on April 1, 2015. EchelonGraph's copy of the record carries a last-modified date of May 28, 2026; the record at its source may have been updated since.
Is CVE-2015-2808 actively exploited?
CVE-2015-2808 is not currently on CISA's Known Exploited Vulnerabilities catalog. 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-2015-2808?
CVE-2015-2808 has a CVSS v3 base score of 3.7 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 10.0 (CRITICAL).
How do I remediate CVE-2015-2808?
A fix for CVE-2015-2808 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2015-2808 are linked in the Vendor Advisories panel on this page.

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