CVE-2025-4086

Summary

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1945705
• https://www.mozilla.org/security/advisories/mfsa2025-28/
• https://www.mozilla.org/security/advisories/mfsa2025-31/

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