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CVE-2010-3131Firefox Vulnerability

Untrusted search path vulnerability in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 on Windows XP allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL…

Published Aug 26, 2010 · Updated Apr 28, 2026

Key Facts

Patch immediately
  • CVE-2010-3131 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Firefox (Mozilla), Seamonkey (Mozilla), Thunderbird (Mozilla).
  • It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
  • EPSS estimates a 23% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Firefox <=3.5.11, Seamonkey <=2.0.6, Thunderbird <=3.0.6.
  • Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

9.3

AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS (30-day exploit likelihood)

23%

Higher than 97.7% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

52/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

4

Proof-of-concept links

In-the-wild evidence

0

Reports of active use

Advisories And Exploit References

Description

Untrusted search path vulnerability in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 on Windows XP allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse dwmapi.dll that is located in the same folder as a .htm, .html, .jtx, .mfp, or .eml file.

Affected Products

212 affected entries in total
ProductAffected versionsFixed in
FirefoxMozilla1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.73.5.11
SeamonkeyMozilla1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.72.0.6
ThunderbirdMozilla0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.7.13.0.6

Patched Releases

Firefox

<=3.5.11

Seamonkey

<=2.0.6

Thunderbird

<=3.0.6

Timeline

  1. Publicly disclosed

    Aug 26, 2010

  2. Last updated

    Apr 28, 2026

References

9 more references in the full CVE brief

FAQ

Common Questions.

Is CVE-2010-3131 On Your Attack Surface?

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Figures as of Oct 19, 2026. Compiled by Brandefense technologies from public vulnerability catalogs; scoring as described in How it works.

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