CVE-2012-4212

CRITICAL

Use-after-free vulnerability in the XPCWrappedNative::Mark function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary c...

Affects 8 products across 4 vendors.

BCS7.63
CVSS 2.010.0
EPSS5.6%
Percentile92th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
CWE Weakness Definitions
CWE-416: Use After Free

Software references memory after it has been freed, leading to corruption, crashes, or code execution.

◆ SAGE Intelligence — CITED Relevance Research Team

This vulnerability was disclosed in 2012. A critical vulnerability affects Canonical systems (CVE-2012-4212). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2012-GLOBAL-092037-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2012-4212?
This vulnerability was disclosed in 2012. A critical vulnerability affects Canonical systems (CVE-2012-4212). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2012-4212?
CVE-2012-4212 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 5.6%.
Is CVE-2012-4212 actively exploited?
No confirmed active exploitation of CVE-2012-4212 as of 2026-05-30.
How do I remediate CVE-2012-4212?
Priority: MEDIUM. Advisory: http://www.mozilla.org/security/announce/2012/mfsa2012-105.html PSIRT: [email protected]
What systems are affected by CVE-2012-4212?
CVE-2012-4212 affects: Canonical, Mozilla, Mozilla, Mozilla, Opensuse, Suse, Suse, Suse.
Vulnerability Details
CVE IDCVE-2012-4212
BSIDBS-2012-GLOBAL-092037-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2012-11-21
Last Modified2026-04-29
ICS Relevance0%
Weakness (CWE)
Use After Free
SourceNVD
Official Description

Use-after-free vulnerability in the XPCWrappedNative::Mark function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Use-after-free vulnerability in the XPCWrappedNative::Mark function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductFixed Version
Canonical Ubuntu Linux —
Mozilla Thunderbird —
Mozilla Seamonkey —
Mozilla Firefox —
Opensuse Opensuse —
Suse Linux Enterprise Software Development Kit —
Suse Linux Enterprise Server —
Suse Linux Enterprise Desktop —
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: August 2026 | Threat Age: 5002 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash539bc72ecd64492085eadf34bbe3da9639a87290e316242742994170987ba8008bb8190417da31e006ba5a271958d1e8faa2d49f5185ca263780d9419603d977
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