Microsoft · ZIP64 End of Central Directory (EOCD) Locator record offset not checked
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 4.3 Medium.
Data as of 28 Oct 2026, 08:59 UTC
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 7 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Security Response Center Microsoft | Affected
| Fixed in– |
Description
CVE-2025-8291 is a vulnerability in Microsoft products where the ZIP64 End of Central Directory (EOCD) Locator record offset is not properly checked. This flaw could potentially lead to issues when processing ZIP64 archives. No CVSS score or detailed impact information is provided.