CVE-2002-0656

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 89% probability of exploitation within the next 30 days (top 0.5% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Elevated
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 90%
CISA-KEV: Not listedEPSS: 90%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

Buffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.8%
KEV
Not listed

Published

August 12, 2002

Last Modified

June 16, 2026

References (24)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2002-08-08redhat
redhatpatch2002-07-31redhat
redhatpatch2002-07-30redhat
redhatpatch2002-07-30redhat

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.

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 1× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-09 13:45 UTCOSV refresh
  2. 2026-07-02 14:00 UTCEPSS rescore
  3. 2026-06-27 03:04 UTCEPSS rescore
  4. 2026-06-24 14:01 UTCEPSS rescore
  5. 2026-06-23 21:29 UTCEPSS rescore
  6. 2026-06-21 02:15 UTCOSV refresh
  7. 2026-06-17 17:49 UTCEPSS rescore
  8. 2026-06-12 23:07 UTCEPSS rescore
  9. 2026-06-11 13:55 UTCEPSS rescore
  10. 2026-06-10 22:13 UTCEPSS rescore
  11. 2026-06-10 13:17 UTCEPSS rescore
  12. 2026-06-02 20:10 UTCEPSS rescore
  13. 2026-06-01 13:48 UTCEPSS rescore
  14. 2026-05-31 19:11 UTCEG score recompute
  15. 2026-05-31 19:11 UTCVendor advisory
  16. 2026-05-31 19:11 UTCGHSA enrichment
  17. 2026-05-29 13:40 UTCEPSS rescore
  18. 2026-05-28 13:42 UTCEPSS rescore
  19. 2026-05-28 13:42 UTCEPSS rescore
  20. 2026-05-28 13:42 UTCEPSS rescore
  21. 2026-05-28 13:42 UTCEPSS rescore
  22. 2026-05-27 13:37 UTCEPSS rescore
  23. 2026-05-27 13:37 UTCEPSS rescore
  24. 2026-05-26 13:41 UTCEPSS rescore
  25. 2026-05-26 13:41 UTCEPSS rescore
Show 8 more
  1. 2026-05-26 13:41 UTCEPSS rescore
  2. 2026-05-26 07:16 UTCEPSS rescore
  3. 2026-05-26 07:16 UTCEPSS rescore
  4. 2026-05-22 08:52 UTCOSV refresh
  5. 2026-05-21 22:38 UTCEPSS rescore
  6. 2026-05-20 22:36 UTCEPSS rescore
  7. 2026-05-18 21:29 UTCEPSS rescore
  8. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40347
    First seen Sep 17, 2002

    Apache mod_ssl OpenSSL < 0.9.6d / < 0.9.7-beta2 - 'openssl-too-open.c' SSL2 KEY_ARG Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2002-0656?
CVE-2002-0656 is a none vulnerability published on August 12, 2002. Buffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.
When was CVE-2002-0656 disclosed?
CVE-2002-0656 was first published in the National Vulnerability Database on August 12, 2002, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2002-0656 actively exploited?
CVE-2002-0656 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2002-0656?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-0656, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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