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Vulnerabilities

Vulnerability · CVE-2024-3863

The executable file warning was not presented when downloading .xrm-ms files.

Published Apr 16, 2024 · catalog updated Nov 3, 2026 · The executable file warning

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2024-3863. EPSS is 0.81%. Act only if a listed version of The executable file warning is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The executable file warning).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.81%
Remediation
Version ranges on file
Affected products
cpe mozilla/firefox · cpe mozilla/thunderbird

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mozilla/firefox< 115.10.0
  • cpe mozilla/firefox< 125.0
  • cpe mozilla/thunderbird< 115.10

How to fix CVE-2024-3863

  • Upgrade

    CVE-2024-3863 lists a fix boundary at 115.10.0. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 115.10.0

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2024-3863. EPSS is 0.81%. Act only if a listed version of The executable file warning is installed.

Which versions are affected?

Compare what you have installed with < 115.10.0, < 125.0, < 115.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-434: Unrestricted Upload of File with Dangerous Type. EPSS 0.81%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 16, 2024 · NIST NVD

    Detected

    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.

  2. Nov 3, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2024-3863

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2024-3863

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • NIST NVDNov 4, 2026