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PatchSiren cyber security CVE debrief

CVE-2026-80075 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in Windows Work Folders, allowing an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. This vulnerability affects Windows systems where Work Folders are used, and defenders should prioritize patching, especially in environments where local privilege escalation is a concern. The vulnerability allows an attacker with local access to potentially elevate privileges, which could lead to increased risk and impact on the affected systems.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-11
Advisory published
2026-09-08
Advisory updated
2026-09-11

Who should care

Defenders responsible for Windows systems, especially those in environments where local privilege escalation is a concern, should prioritize patching this vulnerability.

Why it matters

CVE-2026-80075 is a heap-based buffer overflow vulnerability in Windows Work Folders that allows local privilege escalation. Defenders should prioritize patching, especially in environments where local privilege escalation is a concern.

  • Potential local privilege escalation
  • Increased risk for authorized attackers
  • Need for patching and verification

Technical summary

The vulnerability exists in Windows Work Folders and allows an authorized attacker to elevate privileges locally. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This vulnerability is a heap-based buffer overflow, which can occur when the Windows Work Folders service processes certain inputs. Defenders should prioritize patching this vulnerability, especially in environments where local privilege escalation is a concern. Microsoft has provided a patch and vendor advisory for this vulnerability, which should be applied as soon as possible.

Defensive priority

Defenders should prioritize patching this vulnerability, especially in environments where local privilege escalation is a concern.

Recommended defensive actions

  • Patch vulnerable Windows systems
  • Verify and apply Microsoft's provided patch
  • Monitor for potential local privilege escalation attempts

Evidence notes

The vulnerability is described in the CVE Program record and the NVD vulnerability detail page. Microsoft has provided a patch and vendor advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-80075 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-80075

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

  • CVE-2026-80075 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-80075

    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.