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VulnerabilityPublished Updated

CVE-2025-1016: Memory Safety Bugs Present

Source GCVE Database

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Authoritative record:CVE-2025-1016· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical · fixed in 135 : patch affected systems as a priority.

Data as of 30 Oct 2026, 01:10 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 135, 128.7, 115.20
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 4 Feb 2025

  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 upgrade affected products to Firefox 135, Thunderbird 135, Firefox ESR 115.20, or Firefox ESR 128.7 or later, where these vulnerabilities have been fixed. Mozilla has released official patches addressing these issues. No additional mitigations are required once the updates are applied.

Description

Multiple memory safety vulnerabilities were identified in Firefox, Thunderbird, and Firefox ESR versions prior to their respective fixed releases. These bugs include use-after-free conditions and other memory corruption issues that could potentially allow an attacker to execute arbitrary code. The vulnerabilities were fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, and Firefox ESR 128.7. The CVSS score of 9.8 indicates a critical severity level due to the potential for remote code execution without user interaction or privileges.

References

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