Vulnerability · Published Oct 31, 2026 · Assigned by microsoft
CVE-2026-118147Visual Studio Spoofing Vulnerability
High 7.4
In plain English
A high-severity improper certificate validation in Microsoft Visual Studio 2017 version 15.9 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.6%top 50.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper certificate validation in Visual Studio allows an unauthorized attacker to perform spoofing over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio 2017 version 15.9 | 15.9.0 – before 15.9.84 |
| Microsoft | Microsoft Visual Studio 2019 version 16.11 | 16.11.0 – before 16.11.62 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.44 |
| Microsoft | Microsoft Visual Studio 2026 version 18.11 | 18.11.0 – before 18.11.3 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
References
- Visual Studio Spoofing Vulnerability vendor-advisory, patch