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PatchSiren cyber security CVE debrief

CVE-2026-69626 Microsoft CVE debrief

A buffer over-read vulnerability exists in Microsoft Office, allowing an unauthorized attacker to disclose information over a network. The CVE record was published on 2026-09-08T18:19:34.810Z and has not been modified since then. The NVD entry is currently Analyzed. Defenders responsible for Microsoft Office installations, especially in network-connected environments, should assess exposure and prioritize patching. The vulnerability allows information disclosure over a network, and defenders should prioritize verifying exposure and applying patches. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 6.5 and severity of MEDIUM.

Vendor
Microsoft
Product
Microsoft 365 Apps for Enterprise
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-17
Advisory published
2026-09-08
Advisory updated
2026-09-17

Who should care

Defenders responsible for Microsoft Office installations, especially in network-connected environments, should assess exposure and prioritize patching.

Why it matters

CVE-2026-69626 is a buffer over-read vulnerability in Microsoft Office that allows information disclosure over a network. Defenders should prioritize verifying exposure and applying patches.

  • Verify potential information disclosure over the network.
  • Assess exposure of Microsoft Office installations.

Technical summary

The vulnerability is a buffer over-read in Microsoft Office, which allows an unauthorized attacker to disclose information over a network. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. The vulnerability affects Microsoft Office installations, especially in network-connected environments, and defenders should prioritize verifying exposure and applying patches as available. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 6.5 and severity of MEDIUM. Microsoft has provided a patch and vendor advisory.

Defensive priority

Defenders should prioritize verifying exposure of Microsoft Office installations, especially in network-connected environments, and apply patches as available.

Recommended defensive actions

  • Verify exposure of Microsoft Office installations, especially in network-connected environments.
  • Apply patches as available from Microsoft.
  • Monitor network traffic for potential exploitation attempts.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 6.5 and severity of MEDIUM. Microsoft has provided a patch and vendor advisory.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69626 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69626

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-69626 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69626

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.