Public vulnerability disclosure

CVE-2024-3863

CVE-2024-3863

publishedCWE-434

The executable file warning was not presented when downloading .xrm-ms files. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Technical severity9.8 criticalCVSS 3.1 · ADP: CISA-ADP
Published2024-04-16Source updated 2026-11-03
Collected2026-11-032 attributed sources

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
ProductVersionsAuthority
Firefox
Mozilla
< 125 (affected, custom) CNA: mozilla
Firefox ESR
Mozilla
< 115.10 (affected, custom) CNA: mozilla
Thunderbird
Mozilla
< 115.10 (affected, custom) CNA: mozilla

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / scoreVectorAuthority
3.1 / 9.8
critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HADP: CISA-ADP

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

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