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CVE-2026-77897

Status: AnalyzedHigh (7)—

Relative path traversal in Power Automate allows an authorized attacker to elevate privileges locally.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Microsoft — Power Automate FOR Desktop

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-77897",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-77897",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-09T16:15:09.806116Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Power Automate agent for virtual desktops",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0.0",
              "lessThan": "2.71.115.26224",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Power Automate for Desktop",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0.0",
              "lessThan": "2.71.115.26224",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-08T18:20:39.850",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77897",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-23"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Relative path traversal in Power Automate allows an authorized attacker to elevate privileges locally."
    }
  ],
  "lastModified": "2026-09-29T19:42:55.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:power_automate_for_desktop:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "95527D30-39C3-4861-9B0D-0ED2ECF392EE",
              "versionEndExcluding": "2.71.115.26224"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}