CVE-2012-0053

MEDIUMCVSS v2 · 4.34.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.3 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:P/I:N/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 82.8% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
4.3EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 102 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 83%
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 83%CVSS v2: 4.3Exploit: Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 102

A fix is available — apply it.

protocol.c in the Apache HTTP Server 2.2.x through 2.2.21 does not properly restrict header information during construction of Bad Request (aka 400) error documents, which allows remote attackers to obtain the values of HTTPOnly cookies via vectors involving a (1) long or (2) malformed header in conjunction with crafted web script.

Live · internet exposure

102 internet-exposed hosts are running an affected version of CVE-2012-0053 right now.

across 31 countries (United States, Japan, Taiwan, Canada, France)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v2.0 (legacy)
4.3MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.3(low)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity43% × 45%
Exploitation83% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
83%
EPSS %ILE
100%
KEV
Not listed

Published

January 28, 2012

Last Modified

April 29, 2026

References (90)

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2.2-common (2.2.17-1ubuntu1.5) @ natty2026-05-29ubuntu
redhatpatch2012-05-07redhat
redhathttpd-0:2.2.17-15.4.ep5.el62012-05-07redhat
redhathttpd-0:2.2.3-63.el5_8.12012-02-21redhat
redhathttpd-0:2.2.15-15.el6_2.12012-02-13redhat

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

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
apache22.2.9-10+lenny10 ... 2.2.9-10+lenny9 (10 versions)2.2.9-10+lenny12—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
apache22.2.16-6 ... 2.2.16-6+squeeze4~bpo50+1 (8 versions)2.2.16-6+squeeze6—

All Vendor Advisories

(5)

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 3× in last 7d / 11× 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. 2026-08-26 14:40 UTCEPSS rescore
  2. 2026-08-24 08:27 UTCOSV refresh
  3. 2026-08-21 23:43 UTCEPSS rescore
  4. 2026-08-19 16:59 UTCEPSS rescore
  5. 2026-08-16 02:09 UTCEPSS rescore
  6. 2026-08-15 01:25 UTCEPSS rescore
  7. 2026-08-09 13:42 UTCEPSS rescore
  8. 2026-08-08 16:31 UTCEPSS rescore
  9. 2026-08-08 04:49 UTCOSV refresh
  10. 2026-08-07 16:21 UTCEPSS rescore
  11. 2026-08-05 19:12 UTCEPSS rescore
  12. 2026-07-28 15:31 UTCEPSS rescore
  13. 2026-07-26 13:44 UTCEG score recompute▲ 4.30
  14. 2026-07-23 01:06 UTCEG score recompute▼ 8.60
  15. 2026-07-23 00:10 UTCEG score recompute▲ 8.60
  16. 2026-07-22 21:54 UTCOSV refresh
  17. 2026-07-22 21:48 UTCEG score recompute
  18. 2026-07-22 14:04 UTCEPSS rescore
  19. 2026-07-22 14:04 UTCEPSS rescore
  20. 2026-07-21 15:21 UTCEPSS rescore
  21. 2026-07-20 17:03 UTCEPSS rescore
  22. 2026-07-20 17:03 UTCEPSS rescore
  23. 2026-07-15 16:54 UTCEPSS rescore
  24. 2026-07-15 16:54 UTCEPSS rescore
  25. 2026-07-15 01:56 UTCEPSS rescore
Show 68 more
  1. 2026-07-13 06:08 UTCEPSS rescore
  2. 2026-07-09 19:05 UTCEPSS rescore
  3. 2026-07-05 16:59 UTCOSV refresh
  4. 2026-07-04 06:27 UTCEPSS rescore
  5. 2026-07-01 15:02 UTCEPSS rescore
  6. 2026-06-27 03:05 UTCEPSS rescore
  7. 2026-06-27 03:05 UTCEPSS rescore
  8. 2026-06-24 14:02 UTCEPSS rescore
  9. 2026-06-24 14:02 UTCEPSS rescore
  10. 2026-06-23 21:30 UTCEPSS rescore
  11. 2026-06-21 14:53 UTCEPSS rescore
  12. 2026-06-21 01:56 UTCEPSS rescore
  13. 2026-06-21 01:56 UTCEPSS rescore
  14. 2026-06-17 04:05 UTCOSV refresh
  15. 2026-06-16 17:49 UTCEPSS rescore
  16. 2026-06-16 17:49 UTCEPSS rescore
  17. 2026-06-15 17:44 UTCEPSS rescore
  18. 2026-06-14 23:14 UTCEPSS rescore
  19. 2026-06-14 23:14 UTCEPSS rescore
  20. 2026-06-13 22:57 UTCEPSS rescore
  21. 2026-06-12 23:08 UTCEPSS rescore
  22. 2026-06-11 13:56 UTCEPSS rescore
  23. 2026-06-10 22:14 UTCEPSS rescore
  24. 2026-06-10 13:18 UTCEPSS rescore
  25. 2026-06-08 14:14 UTCEPSS rescore
  26. 2026-06-08 14:14 UTCEPSS rescore
  27. 2026-06-07 15:22 UTCEPSS rescore
  28. 2026-06-07 15:22 UTCEPSS rescore
  29. 2026-06-06 13:45 UTCEPSS rescore
  30. 2026-06-06 13:45 UTCEPSS rescore
  31. 2026-06-05 22:44 UTCEPSS rescore
  32. 2026-06-05 22:44 UTCEPSS rescore
  33. 2026-06-05 06:08 UTCEPSS rescore
  34. 2026-06-05 06:08 UTCEPSS rescore
  35. 2026-06-04 13:09 UTCEPSS rescore
  36. 2026-06-02 20:10 UTCEPSS rescore
  37. 2026-06-02 20:10 UTCEPSS rescore
  38. 2026-05-31 22:28 UTCEPSS rescore
  39. 2026-05-31 22:28 UTCEPSS rescore
  40. 2026-05-31 00:14 UTCEPSS rescore
  41. 2026-05-31 00:14 UTCEPSS rescore
  42. 2026-05-29 13:41 UTCEPSS rescore
  43. 2026-05-29 05:37 UTCEG score recompute
  44. 2026-05-29 05:37 UTCVendor advisory
  45. 2026-05-29 05:37 UTCGHSA enrichment
  46. 2026-05-28 13:42 UTCEPSS rescore
  47. 2026-05-28 13:42 UTCEPSS rescore
  48. 2026-05-27 13:38 UTCEPSS rescore
  49. 2026-05-27 13:38 UTCEPSS rescore
  50. 2026-05-26 13:41 UTCEPSS rescore
  51. 2026-05-26 13:41 UTCEPSS rescore
  52. 2026-05-26 07:16 UTCEPSS rescore
  53. 2026-05-26 07:16 UTCEPSS rescore
  54. 2026-05-26 07:16 UTCEPSS rescore
  55. 2026-05-24 16:43 UTCEPSS rescore
  56. 2026-05-22 21:15 UTCEPSS rescore
  57. 2026-05-22 21:15 UTCEPSS rescore
  58. 2026-05-22 21:15 UTCEPSS rescore
  59. 2026-05-22 01:06 UTCOSV refresh
  60. 2026-05-21 22:39 UTCEPSS rescore
  61. 2026-05-20 22:37 UTCEPSS rescore
  62. 2026-05-20 22:37 UTCEPSS rescore
  63. 2026-05-20 22:37 UTCEPSS rescore
  64. 2026-05-20 11:21 UTCEPSS rescore
  65. 2026-05-20 11:21 UTCEPSS rescore
  66. 2026-05-20 11:21 UTCEPSS rescore
  67. 2026-05-18 21:29 UTCEPSS rescore
  68. 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-18442✓ verified
    First seen Jan 31, 2012

    Apache - httpOnly Cookie Disclosure

    Open source ↗

Frequently asked(4)

What is CVE-2012-0053?
CVE-2012-0053 is a medium vulnerability published on January 28, 2012. protocol.c in the Apache HTTP Server 2.2.x through 2.2.21 does not properly restrict header information during construction of Bad Request (aka 400) error documents, which allows remote attackers to obtain the values of HTTPOnly cookies via vectors involving a (1) long or (2) malformed header in…
When was CVE-2012-0053 disclosed?
CVE-2012-0053 was first published in the National Vulnerability Database on January 28, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-0053 actively exploited?
CVE-2012-0053 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83% probability of exploitation in the next 30 days, which ranks it in the top 0.4% of all scored CVEs.
How do I remediate CVE-2012-0053?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-0053, 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

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