CVE-2002-0653

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 1.1%, top 38% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
7.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), public exploit)
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: Exploit-DB (verified) · public exploitExposed: 0

A fix is available — apply it.

Off-by-one buffer overflow in the ssl_compat_directive function, as called by the rewrite_command hook for mod_ssl Apache module 2.8.9 and earlier, allows local users to execute arbitrary code as the Apache server user via .htaccess files with long entries.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
66(Track)
EG Risk 66/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
64%
KEV
Not listed

Published

July 11, 2002

Last Modified

June 16, 2026

Advisory Details (4)

Auto-updated May 31, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Debian -- The Universal Operating System

http://www.debian.org/security/2002/dsa-135
generic

'Another flaw in Apache?' - MARC

http://marc.info/?l=vuln-dev&m=102477330617604&w=2
generic

'[ESA-20020702-017] off-by-one in mod_ssl's configuration directive' - MARC

http://marc.info/?l=bugtraq&m=102563469326072&w=2
generic🟡 PoC Available

'Apache mod_ssl off-by-one vulnerability' - MARC

http://marc.info/?l=bugtraq&m=102513970919836&w=2

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2003-04-22redhat
redhatpatch2002-08-01redhat
redhatpatch2002-07-31redhat
redhatpatch2002-07-24redhat
redhatpatch2002-07-16redhat
redhatpatch2002-07-16redhat

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

(1 across 1 ecosystem)
Debian:3.0(1)
PackageVulnerable rangeFixed inDependents
libapache-mod-ssl2.4.10-1.3.9-1potato2, 2.4.10-1.3.9-1potato4, 2.8.7-12.8.9-2—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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 0× in last 7d / 1× 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. 2026-09-04 04:59 UTCEPSS rescore
  2. 2026-08-03 10:27 UTCEPSS rescore
  3. 2026-07-23 00:44 UTCEG score recompute
  4. 2026-07-23 00:25 UTCEG score recompute
  5. 2026-07-22 23:48 UTCEG score recompute
  6. 2026-07-22 21:28 UTCEG score recompute
  7. 2026-07-20 17:02 UTCEPSS rescore
  8. 2026-07-18 09:59 UTCEPSS rescore
  9. 2026-07-16 16:58 UTCEPSS rescore
  10. 2026-07-15 16:53 UTCEPSS rescore
  11. 2026-07-15 01:55 UTCEPSS rescore
  12. 2026-07-11 08:22 UTCEPSS rescore
  13. 2026-07-08 15:08 UTCEPSS rescore
  14. 2026-07-04 06:26 UTCEPSS rescore
  15. 2026-07-02 14:00 UTCEPSS rescore
  16. 2026-06-29 14:02 UTCEPSS rescore
  17. 2026-06-28 14:02 UTCEPSS rescore
  18. 2026-06-27 03:04 UTCEPSS rescore
  19. 2026-06-24 14:01 UTCEPSS rescore
  20. 2026-06-23 21:29 UTCEPSS rescore
  21. 2026-06-22 14:22 UTCEPSS rescore
  22. 2026-06-21 01:56 UTCEPSS rescore
  23. 2026-06-19 19:22 UTCEPSS rescore
  24. 2026-06-18 17:49 UTCEPSS rescore
  25. 2026-06-18 17:49 UTCEPSS rescore
Show 40 more
  1. 2026-06-17 17:49 UTCEPSS rescore
  2. 2026-06-16 17:49 UTCEPSS rescore
  3. 2026-06-14 23:13 UTCEPSS rescore
  4. 2026-06-13 22:56 UTCEPSS rescore
  5. 2026-06-12 23:07 UTCEPSS rescore
  6. 2026-06-11 13:55 UTCEPSS rescore
  7. 2026-06-10 22:13 UTCEPSS rescore
  8. 2026-06-10 13:17 UTCEPSS rescore
  9. 2026-06-08 14:13 UTCEPSS rescore
  10. 2026-06-07 15:21 UTCEPSS rescore
  11. 2026-06-06 13:44 UTCEPSS rescore
  12. 2026-06-05 06:07 UTCEPSS rescore
  13. 2026-06-04 13:09 UTCEPSS rescore
  14. 2026-06-02 20:10 UTCEPSS rescore
  15. 2026-06-01 13:48 UTCEPSS rescore
  16. 2026-05-31 22:27 UTCEPSS rescore
  17. 2026-05-31 19:19 UTCEG score recompute
  18. 2026-05-31 19:19 UTCVendor advisory
  19. 2026-05-31 19:19 UTCGHSA enrichment
  20. 2026-05-31 00:13 UTCEPSS rescore
  21. 2026-05-31 00:13 UTCEPSS rescore
  22. 2026-05-29 13:40 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-28 13:42 UTCEPSS rescore
  25. 2026-05-28 13:42 UTCEPSS rescore
  26. 2026-05-28 13:42 UTCEPSS rescore
  27. 2026-05-27 13:37 UTCEPSS rescore
  28. 2026-05-27 13:37 UTCEPSS rescore
  29. 2026-05-26 13:41 UTCEPSS rescore
  30. 2026-05-26 13:41 UTCEPSS rescore
  31. 2026-05-26 13:41 UTCEPSS rescore
  32. 2026-05-26 07:16 UTCEPSS rescore
  33. 2026-05-26 07:16 UTCEPSS rescore
  34. 2026-05-22 21:15 UTCEPSS rescore
  35. 2026-05-21 22:38 UTCEPSS rescore
  36. 2026-05-20 22:36 UTCEPSS rescore
  37. 2026-05-20 11:20 UTCEPSS rescore
  38. 2026-05-20 11:20 UTCEPSS rescore
  39. 2026-05-18 21:29 UTCEPSS rescore
  40. 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-21575✓ verified
    First seen Jun 22, 2002

    Apache mod_ssl 2.8.x - Off-by-One HTAccess Buffer Overflow

    Open source ↗

Frequently asked(5)

What is CVE-2002-0653?
CVE-2002-0653 is a high vulnerability published on July 11, 2002. Off-by-one buffer overflow in the sslcompatdirective function, as called by the rewritecommand hook for modssl Apache module 2.8.9 and earlier, allows local users to execute arbitrary code as the Apache server user via .htaccess files with long entries.
When was CVE-2002-0653 disclosed?
CVE-2002-0653 was first published in the National Vulnerability Database on July 11, 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-2002-0653 actively exploited?
CVE-2002-0653 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 35.9% of all scored CVEs.
What is the CVSS score of CVE-2002-0653?
CVE-2002-0653 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2002-0653?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-0653, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2002-0653

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