CVE-2011-4566

MEDIUMCVSS v2 · 6.46.4—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.4 — 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:L/Au:N/C:P/I:N/A:P. 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 6.6% 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
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 7%CVSS v2: 6.4Exploit: None knownExposed: 0

A fix is available — apply it.

Integer overflow in the exif_process_IFD_TAG function in exif.c in the exif extension in PHP 5.4.0beta2 on 32-bit platforms allows remote attackers to read the contents of arbitrary memory locations or cause a denial of service via a crafted offset_val value in an EXIF header in a JPEG file, a different vulnerability than CVE-2011-0708.

CVSS v2.0 (legacy)
6.4MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.4(low)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity64% × 45%
Exploitation7% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
7%
EPSS %ILE
93%
KEV
Not listed

Published

November 29, 2011

Last Modified

April 29, 2026

References (26)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp5-cgi (5.2.4-2ubuntu5.19) @ hardy2026-05-29ubuntu
redhatphp-0:4.3.9-3.352012-01-30redhat
redhatphp-0:5.1.6-27.el5_7.42012-01-18redhat
redhatphp-0:5.3.3-3.el6_2.52012-01-11redhat

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

(2 across 2 ecosystems)
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
php55.2.6.dfsg.1-1+lenny10 ... 5.2.6.dfsg.1-1+lenny9 (10 versions)5.2.6.dfsg.1-1+lenny14—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
php55.3.3-7, 5.3.3-7+squeeze1, 5.3.3-7+squeeze2, 5.3.3-7+squeeze35.3.3-7+squeeze5—

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 / 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.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-08-25 13:43 UTCEPSS rescore
  2. 2026-08-19 16:58 UTCEPSS rescore
  3. 2026-08-18 13:42 UTCEPSS rescore
  4. 2026-08-15 01:25 UTCEPSS rescore
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  11. 2026-07-30 01:26 UTCEPSS rescore
  12. 2026-07-26 13:44 UTCEG score recompute▲ 6.40
  13. 2026-07-23 14:14 UTCEPSS rescore
  14. 2026-07-23 01:06 UTCEG score recompute
  15. 2026-07-23 00:09 UTCEG score recompute
  16. 2026-07-22 21:48 UTCEG score recompute
  17. 2026-07-22 14:03 UTCEPSS rescore
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  24. 2026-07-16 16:58 UTCEPSS rescore
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  1. 2026-07-15 16:54 UTCEPSS rescore
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  17. 2026-06-30 23:19 UTCEPSS rescore
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  19. 2026-06-28 14:03 UTCEPSS rescore
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  22. 2026-06-27 03:05 UTCEPSS rescore
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  24. 2026-06-25 13:46 UTCEPSS rescore
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  27. 2026-06-23 21:30 UTCEPSS rescore
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  44. 2026-06-12 23:08 UTCEPSS rescore
  45. 2026-06-11 13:56 UTCEPSS rescore
  46. 2026-06-10 22:14 UTCEPSS rescore
  47. 2026-06-10 13:17 UTCEPSS rescore
  48. 2026-06-08 14:14 UTCEPSS rescore
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  50. 2026-06-07 15:22 UTCEPSS rescore
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  52. 2026-06-06 13:45 UTCEPSS rescore
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  65. 2026-05-29 13:41 UTCEPSS rescore
  66. 2026-05-29 13:40 UTCEPSS rescore
  67. 2026-05-29 06:09 UTCEG score recompute
  68. 2026-05-29 06:09 UTCVendor advisory
  69. 2026-05-29 06:09 UTCGHSA enrichment
  70. 2026-05-28 13:42 UTCEPSS rescore
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  73. 2026-05-27 13:38 UTCEPSS rescore
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  75. 2026-05-26 07:16 UTCEPSS rescore

Frequently asked(4)

What is CVE-2011-4566?
CVE-2011-4566 is a medium vulnerability published on November 29, 2011. Integer overflow in the exifprocessIFDTAG function in exif.c in the exif extension in PHP 5.4.0beta2 on 32-bit platforms allows remote attackers to read the contents of arbitrary memory locations or cause a denial of service via a crafted offsetval value in an EXIF header in a JPEG file, a…
When was CVE-2011-4566 disclosed?
CVE-2011-4566 was first published in the National Vulnerability Database on November 29, 2011, 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-2011-4566 actively exploited?
CVE-2011-4566 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7% probability of exploitation in the next 30 days, which ranks it in the top 6.7% of all scored CVEs.
How do I remediate CVE-2011-4566?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4566, 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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