SB2026110534 - Improper Certificate Validation in Visual Studio

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Certificate Validation (CVE-ID: CVE-2026-118147)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to spoof a network resource and read or modify highly sensitive information exchanged with it.

The vulnerability exists due to improper certificate validation in Visual Studio when establishing network communications. A remote attacker can position themselves in the logical network path between the target and the resource requested by the victim to perform a machine-in-the-middle attack and read or modify network communications.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-118147
• https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes