CVE-2014-3581

MEDIUMCVSS v2 · 5.05.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — 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:N/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 13.5% 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
Elevated
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 14%CVSS v2: 5.0Exploit: Elevated riskExposed: 0

A fix is available — apply it.

The cache_merge_headers_out function in modules/cache/cache_util.c in the mod_cache module in the Apache HTTP Server before 2.4.11 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty HTTP Content-Type header.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0(low)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity50% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
14%
EPSS %ILE
96%
KEV
Not listed

Published

October 10, 2014

Last Modified

May 6, 2026

References (58)

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2.2-bin (2.4.10-1ubuntu1.1) @ utopic2026-05-28ubuntu
redhatpatch2015-12-16redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el62015-12-16redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el72015-12-16redhat
redhathttpd-0:2.4.6-31.el72015-03-05redhat
redhathttpd24-httpd-0:2.4.6-25.el72014-12-09redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.10-3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.10-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.10-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.10-3—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
apache22.2.16-6 ... 2.2.16-6+squeeze8 (15 versions)2.2.16-6+squeeze14—

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 5× in last 7d / 21× 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 136 total refreshes for this CVE.

  1. 2026-09-18 19:21 UTCEPSS rescore
  2. 2026-09-17 19:21 UTCEPSS rescore
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  7. 2026-09-10 09:23 UTCOSV refresh
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  1. 2026-08-15 01:25 UTCEPSS rescore
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  5. 2026-08-07 16:21 UTCEPSS rescore
  6. 2026-08-07 09:27 UTCOSV refresh
  7. 2026-08-06 13:42 UTCEPSS rescore
  8. 2026-08-05 19:12 UTCEPSS rescore
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  16. 2026-07-26 13:50 UTCEG score recompute▲ 5.00
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  22. 2026-07-22 14:04 UTCEPSS rescore
  23. 2026-07-22 02:18 UTCOSV refresh
  24. 2026-07-21 15:21 UTCEPSS rescore
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  26. 2026-07-20 17:03 UTCEPSS rescore
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  43. 2026-07-04 20:56 UTCOSV refresh
  44. 2026-07-04 06:27 UTCEPSS rescore
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  71. 2026-06-14 23:14 UTCEPSS rescore
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  75. 2026-06-10 22:15 UTCEPSS rescore

Frequently asked(4)

What is CVE-2014-3581?
CVE-2014-3581 is a medium vulnerability published on October 10, 2014. The cachemergeheadersout function in modules/cache/cacheutil.c in the mod_cache module in the Apache HTTP Server before 2.4.11 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty HTTP Content-Type header.
When was CVE-2014-3581 disclosed?
CVE-2014-3581 was first published in the National Vulnerability Database on October 10, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-3581 actively exploited?
CVE-2014-3581 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14% probability of exploitation in the next 30 days, which ranks it in the top 3.7% of all scored CVEs.
How do I remediate CVE-2014-3581?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2014-3581, 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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