CVE-2016-9079
Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability
- High 7.5
- Exploited: added to CISA KEV 22 Jun 2023
- A public exploit reference is listed
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.
Key facts
- Published
- 11 Jun 2018
- Last changed
- 21 Oct 2025
- Assigned by
- mozilla
- KEV added
- 22 Jun 2023
- KEV fix due
- 13 Jul 2023
- EPSS
- 87.357% likely to be exploited in the next 30 days, higher than 99.759% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.5CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox |
|
| Mozilla | Firefox ESR |
|
| Mozilla | Thunderbird |
|
Timeline
- 11 Jun 2018 Published
- 22 Jun 2023 CVE-2016-9079 added to CISA KEV
- 22 Jun 2023 Added to the CISA KEV catalogue