# CVE-2016-9079: Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability

> CVE-2016-9079: Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2016-9079
Last updated: 2025-10-21T23:45:50Z

- Published: 2018-06-11 21:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: mozilla
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS: 87.4%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-06-22, federal due date 2023-07-13, ransomware use: Unknown

## Description

A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows. This vulnerability affects Firefox \< 50.0.2, Firefox ESR \< 45.5.1, and Thunderbird \< 45.5.1.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Mozilla: Firefox
- Mozilla: Firefox ESR
- Mozilla: Thunderbird

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2016-9079)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2016-9079)
- [http://rhn.redhat.com/errata/RHSA-2016-2843.html](http://rhn.redhat.com/errata/RHSA-2016-2843.html)
- [http://rhn.redhat.com/errata/RHSA-2016-2850.html](http://rhn.redhat.com/errata/RHSA-2016-2850.html)
- [https://bugzilla.mozilla.org/show\_bug.cgi?id=1321066](https://bugzilla.mozilla.org/show_bug.cgi?id=1321066)
- [https://security.gentoo.org/glsa/201701-15](https://security.gentoo.org/glsa/201701-15)
- [https://security.gentoo.org/glsa/201701-35](https://security.gentoo.org/glsa/201701-35)
- [https://www.debian.org/security/2016/dsa-3730](https://www.debian.org/security/2016/dsa-3730)
- [https://www.exploit-db.com/exploits/41151/](https://www.exploit-db.com/exploits/41151/)
- [https://www.exploit-db.com/exploits/42327/](https://www.exploit-db.com/exploits/42327/)
- [https://www.mozilla.org/security/advisories/mfsa2016-92/](https://www.mozilla.org/security/advisories/mfsa2016-92/)
- [http://www.securityfocus.com/bid/94591](http://www.securityfocus.com/bid/94591)
- [http://www.securitytracker.com/id/1037370](http://www.securitytracker.com/id/1037370)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2016-9079 · Markdown: https://rewindex.com/cve/CVE-2016-9079.md · JSON: https://rewindex.com/api/v1/cves/CVE-2016-9079 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:01:44.842Z