High severity8.2NVD Advisory· Published Mar 4, 2025· Updated Apr 13, 2026

CVE-2025-1943

Description

Memory safety bugs present in Firefox 135 and Thunderbird 135. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 136 and Thunderbird 136.

Affected products

Mozilla Corporation/Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Range: <136.0
Mozilla Corporation/Thunderbird
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Range: <136.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.mozilla.org/security/advisories/mfsa2025-14/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2025-17/nvdVendor Advisory
bugzilla.mozilla.org/buglist.cginvdBroken Link

News mentions

No linked articles in our index yet.

cvss	0.533
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000