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TI-2026-83561 Aliases CVE-2026-118147GHSA-hqh8-88g9-j6xw

Improper certificate validation in Visual Studio enables spoofing

Priority LOW 35CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-295.

Summary

Improper certificate validation in Microsoft Visual Studio 2017 version 15.9 from 15.9.0 before 15.9.84, Visual Studio 2019 version 16.11 from 16.11.0 before 16.11.62, Visual Studio 2022 version 17.14 from 17.14.0 before 17.14.44, and Visual Studio 2026 version 18.11 from 18.11.0 before 18.11.3 lets an unauthorized attacker perform spoofing over a network. The flaw is tracked as CWE-295. The CVSS vector rates attack complexity as high and requires no privileges or user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-11-01

Description from the CNA

Improper certificate validation in Visual Studio allows an unauthorized attacker to perform spoofing over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00612 49th percentileScored 2026-11-07
Fix Fixed Microsoft Visual Studio 2017 version 15.9 (Microsoft): 15.9.84Microsoft Visual Studio 2019 version 16.11 (Microsoft): 16.11.62+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Visual Studio 2017 version 15.915.9.0 to before 15.9.8415.9.84Patch availableCNA
MicrosoftMicrosoft Visual Studio 2019 version 16.1116.11.0 to before 16.11.6216.11.62Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.1417.14.0 to before 17.14.4417.14.44Patch availableCNA
MicrosoftMicrosoft Visual Studio 2026 version 18.1118.11.0 to before 18.11.318.11.3Patch availableCNA
  • Microsoft Visual Studio 2017 version 15.9 VendorMicrosoft Affected 15.9.0 to before 15.9.84 Fixed in 15.9.84 Patch available CNA
  • Microsoft Visual Studio 2019 version 16.11 VendorMicrosoft Affected 16.11.0 to before 16.11.62 Fixed in 16.11.62 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.14 VendorMicrosoft Affected 17.14.0 to before 17.14.44 Fixed in 17.14.44 Patch available CNA
  • Microsoft Visual Studio 2026 version 18.11 VendorMicrosoft Affected 18.11.0 to before 18.11.3 Fixed in 18.11.3 Patch available CNA

Remediation

Update Microsoft Visual Studio 2017 version 15.9 to 15.9.84, Visual Studio 2019 version 16.11 to 16.11.62, Visual Studio 2022 version 17.14 to 17.14.44, and Visual Studio 2026 version 18.11 to 18.11.3.

Written with Claude Haiku 5.5 from the sources below · 2026-11-01

  • Fix · CNA Microsoft Visual Studio 2017 version 15.9 (Microsoft) Fixed in 15.9.84
  • Fix · CNA Microsoft Visual Studio 2019 version 16.11 (Microsoft) Fixed in 16.11.62
  • Fix · CNA Microsoft Visual Studio 2022 version 17.14 (Microsoft) Fixed in 17.14.44
  • Fix · CNA Microsoft Visual Studio 2026 version 18.11 (Microsoft) Fixed in 18.11.3

Timeline

  1. 2026-10-31 Threatist record created from CVE-2026-118147
  2. 2026-10-31 Alias added: GHSA-hqh8-88g9-j6xw
  3. 2026-11-02 Priority changed: MEDIUM → LOW
  4. 2026-11-06 CISA SSVC decision points changed
  5. 2026-11-07 CISA SSVC decision points changed

References

Patch 1

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences