On Windows 10, when using the 'Save As' functionality, an attacker could have tricked the browser into saving the file with a disallowed…

Description

On Windows 10, when using the 'Save As' functionality, an attacker could have tricked the browser into saving the file with a disallowed extension such as `.url` by including an invalid character in the extension. *Note:* This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

Scores

EPSS (exploitation in 30 days)

0.61% · top 50% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• Bypass of file name restrictions during saving
• CWE-noinfo Not enough information

Affected products

• Mozilla · Firefox

  • affected unspecified – < 127

• Mozilla · Firefox ESR

  • affected unspecified – < 115.12

• Mozilla · Thunderbird

  • affected unspecified – < 115.12

References (4)

• https://bugzilla.mozilla.org/show_bug.cgi?id=1891234 (opens in a new tab)x_transferred
• https://www.mozilla.org/security/advisories/mfsa2024-25/ (opens in a new tab)x_transferred
• https://www.mozilla.org/security/advisories/mfsa2024-26/ (opens in a new tab)x_transferred
• https://www.mozilla.org/security/advisories/mfsa2024-28/ (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-5692](https://trackcve.app/badge/CVE-2024-5692.svg)](https://trackcve.app/cve/CVE-2024-5692)

Record last updated 27 Feb 2026, 16:40 UTC.