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Vulnerability record · CVE-2026-80080 · published 8 September 2026

CVE-2026-80080: Microsoft 365 apps double free vulnerability

Microsoft · 365 Apps

Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

8.8 CVSS 3.1 High EPSS 0.82% · top 44.5% CWE-415 · Double free
8.8CVSS 3.1 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
1References
17 Sep 2026Last modified by NVD

Description

Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80080 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-80080), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.