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CVE-2026-77897 Microsoft CVE debrief

CVE-2026-77897 is a relative path traversal vulnerability in Power Automate For Desktop, allowing an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and is classified as HIGH severity. Defenders should assess exposure and prioritize mitigation, especially in local privilege escalation scenarios. This vulnerability affects Power Automate For Desktop deployments, and defenders should verify and mitigate it accordingly. The CVE record and NVD detail page provide information on the vulnerability, but vendor advisory details are limited. The vulnerability allows an authorized attacker to elevate privileges locally, and defenders should assess

Vendor
Microsoft
Product
Power Automate For Desktop
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-29
Advisory published
2026-09-08
Advisory updated
2026-09-29

Who should care

Defenders responsible for Power Automate For Desktop deployments, especially those with local privilege escalation concerns, should assess exposure and prioritize mitigation.

Why it matters

CVE-2026-77897 is a relative path traversal vulnerability in Power Automate For Desktop, allowing an authorized attacker to elevate privileges locally. Defenders should prioritize verifying and mitigating this vulnerability, especially in local privilege escalation scenarios.

  • Local privilege escalation is possible, requiring verification and mitigation
  • Authorized attackers can exploit this vulnerability to elevate privileges
  • Defenders should assess exposure in Power Automate For Desktop deployments

Technical summary

CVE-2026-77897 is a relative path traversal vulnerability in Power Automate For Desktop, allowing an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and is classified as HIGH severity. Defenders should assess exposure and prioritize mitigation, especially in local privilege escalation scenarios. The vulnerability affects Power Automate For Desktop deployments, and defenders should verify and mitigate it accordingly.

Defensive priority

Defenders should prioritize verifying and mitigating this vulnerability in Power Automate For Desktop, especially in local privilege escalation scenarios.

Recommended defensive actions

  • Verify and apply the vendor advisory for CVE-2026-77897
  • Assess local privilege escalation risks in Power Automate For Desktop deployments
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, but vendor advisory details are limited. The vulnerability allows an authorized attacker to elevate privileges locally, and defenders should assess exposure and prioritize mitigation. The CVE Program and NVD records indicate that the vulnerability has a CVSS score of 7 and is classified as HIGH severity. Defenders should verify and mitigate this vulnerability, especially in local privilege escalation scenarios

Sources and references

Verified primary and authoritative sources

  • CVE-2026-77897 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-77897

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

  • CVE-2026-77897 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-77897

    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.