CVE-2014-1576
CVE-2014-1576 is a high-severity vulnerability in Mozilla Thunderbird with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: High (CVSS 2.0 base score 7.5)
- EPSS exploit prediction: 5% (91st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Mozilla Thunderbird
- Published:
- Last modified:
Description
Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via Cascading Style Sheets (CSS) token sequences that trigger changes to capitalization style.
Frequently asked questions
- What is CVE-2014-1576?
- Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via Cascading Style Sheets (CSS) token sequences that trigger changes to capitalization style.
- How severe is CVE-2014-1576?
- CVE-2014-1576 has a CVSS 2.0 base score of 7.5, rated high severity.
- Is CVE-2014-1576 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2014-1576?
- CVE-2014-1576 primarily affects Mozilla Thunderbird. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2014-1576?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2014-1576 published?
- CVE-2014-1576 was published on 2014-10-15 and last updated on 2026-06-17.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-November/141796.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/141085.html
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00024.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00000.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00001.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00002.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00003.html
- http://rhn.redhat.com/errata/RHSA-2014-1635.html
- http://secunia.com/advisories/61387
- http://secunia.com/advisories/61854
- http://secunia.com/advisories/62021
- http://secunia.com/advisories/62022
- http://secunia.com/advisories/62023
- http://www.debian.org/security/2014/dsa-3050
- http://www.debian.org/security/2014/dsa-3061
- http://www.mozilla.org/security/announce/2014/mfsa2014-75.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.securityfocus.com/bid/70430
- http://www.securitytracker.com/id/1031028
- http://www.securitytracker.com/id/1031030
- http://www.ubuntu.com/usn/USN-2372-1
- http://www.ubuntu.com/usn/USN-2373-1
- https://advisories.mageia.org/MGASA-2014-0421.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1041512
- https://security.gentoo.org/glsa/201504-01
Affected products (6)
- cpe:2.3:a:mozilla:thunderbird:31.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:31.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:31.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:31.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox:30.0:*:*:*:*:*:*:*
More vulnerabilities in Mozilla Thunderbird
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- CVE-2026-4689 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was…
- CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
- CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
- CVE-2026-2768 — Critical (CVSS 10.0): Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8,…
- CVE-2026-2761 — Critical (CVSS 10.0): Sandbox escape in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33,…
All CVEs affecting Mozilla Thunderbird →
Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities
- CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
- CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
- CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
- CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.