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CVE-2026-69455 Microsoft CVE debrief

CVE-2026-69455 is a high-severity vulnerability in the Windows Remote Access Connection Manager that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and defenders should prioritize patching to prevent potential attacks.

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
2026-09-25
Advisory published
2026-09-08
Advisory updated
2026-09-25

Who should care

Defenders who manage Windows systems, especially those that use the Windows Remote Access Connection Manager, should prioritize patching to prevent potential attacks.

Why it matters

CVE-2026-69455 is a high-severity vulnerability in the Windows Remote Access Connection Manager that allows an authorized attacker to elevate privileges locally. Defenders should prioritize patching to prevent potential attacks.

  • Potential privilege escalation
  • Possible lateral movement within a network
  • Need for timely patching and vulnerability management
  • Potential for attackers to gain elevated access

Technical summary

The vulnerability is a heap-based buffer overflow in the Windows Remote Access Connection Manager that allows an authorized attacker to elevate privileges locally. The CVE record and NVD detail page provide additional information about the vulnerability.

Defensive priority

Patching is a high priority for this vulnerability, especially for systems that use the Windows Remote Access Connection Manager.

Recommended defensive actions

  • Apply the patch released by Microsoft
  • Review and update vulnerability management processes to ensure timely patching
  • Monitor systems for potential attacks

Evidence notes

The vulnerability is described as a heap-based buffer overflow in the Windows Remote Access Connection Manager. The CVE record and NVD detail page provide additional information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69455 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69455

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

  • CVE-2026-69455 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69455

    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.