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VulnerabilityPublished Updated

CVE-2024-9401: Memory Safety Bugs Present

Source GCVE Database

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Authoritative record:CVE-2024-9401· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical · fixed in 131 : patch affected systems as a priority.

Data as of 30 Oct 2026, 02:14 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.19.8
Patch
Available – fixed in 131, 128.3, 115.16
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Oct 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Users and administrators should update affected Firefox and Thunderbird installations to the fixed versions: Firefox 131, Firefox ESR 115.16, Firefox ESR 128.3, Thunderbird 131, and Thunderbird 128.3. Applying these official updates fully mitigates the vulnerabilities. No additional mitigation actions are indicated by the vendor advisory.

Description

Multiple memory safety bugs were identified in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. These bugs showed evidence of memory corruption and could potentially be exploited to execute arbitrary code. The vulnerabilities have been fixed in Firefox 131, Firefox ESR 115.16, Firefox ESR 128.3, Thunderbird 131, and Thunderbird 128.3. The CVSS score is 9.8, indicating critical severity. No known exploits in the wild have been reported at this time.

References

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