SB2026101406 - Use of a broken or risky cryptographic algorithm in Microsoft Windows
Published: October 14, 2026
Security Bulletin ID
SB2026101406
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2026-59116)
CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
CVSSv4: 7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass a security feature.
The vulnerability exists due to use of a broken or risky cryptographic algorithm in Windows Remote Desktop when using cryptography for network connections. A remote attacker can create a SHA1 hash collision to bypass a security feature.
Successful exploitation requires user interaction.
Remediation
Install update from vendor's website.