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CVE-2026-81377 Microsoft CVE debrief

CVE-2026-81377 is a path traversal vulnerability in Visual Studio Code that allows an unauthorized attacker to perform tampering over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Microsoft has released a patch for this vulnerability. Defenders responsible for Visual Studio Code installations should assess exposure and prioritize patching to prevent potential tampering by unauthorized attackers. The vulnerability is described as a path traversal issue in Visual Studio Code, allowing an unauthorized attacker to perform tampering over a network. To address this vulnerability, defenders should prioritize patching Visual Studio Code to prevent potential

Vendor
Microsoft
Product
Visual Studio Code
CVSS
MEDIUM 6.5
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 Visual Studio Code installations should assess exposure and prioritize patching to prevent potential tampering by unauthorized attackers.

Why it matters

CVE-2026-81377 is a path traversal vulnerability in Visual Studio Code that allows an unauthorized attacker to perform tampering over a network. Defenders responsible for Visual Studio Code installations should assess exposure and prioritize patching to prevent potential tampering.

  • Verify patch deployment to prevent tampering
  • Assess exposure of Visual Studio Code installations
  • Monitor for suspicious activity related to path traversal

Technical summary

The vulnerability is a path traversal issue in Visual Studio Code, allowing an unauthorized attacker to perform tampering over a network. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. This vulnerability affects Visual Studio Code and allows an attacker to perform tampering over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Microsoft has released a patch for this vulnerability, and defenders should prioritize patching Visual Studio Code to prevent potential tampering by unauthorized attackers.

Defensive priority

Defenders should prioritize patching Visual Studio Code to prevent potential tampering by unauthorized attackers.

Recommended defensive actions

  • Patch Visual Studio Code to prevent potential tampering by unauthorized attackers
  • Verify that Visual Studio Code is up-to-date with the latest security patches
  • Monitor Visual Studio Code for any suspicious activity

Evidence notes

The vulnerability is described as a path traversal issue in Visual Studio Code, allowing an unauthorized attacker to perform tampering over a network.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-81377 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-81377

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

  • CVE-2026-81377 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-81377

    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.