Certificate Validation
The latest Certificate Validation coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft Patches Windows Certificate Bypass Vulnerability — Here’s What You Need to Install
Microsoft’s July 14, 2026 cumulative updates patch a security flaw in Windows Cryptographic Services that could allow a remote attacker to bypass certificate validation and trick systems into...
Microsoft Sounds Alarm Over GnuTLS CVE-2026-42012: A TLS Bypass Hitting Windows Where It Hurts
Microsoft’s security team has published a detailed advisory for CVE-2026-42012, a critical vulnerability in the GnuTLS library that can allow attackers to bypass TLS certificate validation...
Siemens Analytics Toolkit Certificate Flaw (CVE-2025-40745) Exposes Industrial Software to MITM Attacks
Multiple Siemens engineering and manufacturing applications contain a critical certificate validation vulnerability in the Siemens Analytics Toolkit that could allow man-in-the-middle attacks against...
Siemens Analytics Toolkit CVE-2025-40745: Critical Certificate Validation Flaw Exposes Industrial Systems to MITM Attacks
A critical vulnerability in Siemens Analytics Toolkit allows attackers to intercept and manipulate communications between industrial engineering applications through improper certificate validation....
CVE-2026-33810: Critical Go crypto/x509 Name-Constraint Bypass Threatens Windows PKI Security
Microsoft's security advisory for CVE-2026-33810 reveals a critical vulnerability in the Go programming language's crypto/x509 certificate validation library that could undermine Windows PKI...
CVE-2024-0567: GnuTLS Distributed Trust DoS Vulnerability Explained
A critical vulnerability in the GnuTLS cryptographic library, tracked as CVE-2024-0567, exposes systems to denial-of-service attacks through a subtle flaw in certificate-chain validation. This...
Mbed TLS bug in versions before 2.23.0 lets malformed certs bypass verification.
The discovery of CVE-2020-36478 in Mbed TLS revealed a subtle but significant vulnerability in certificate validation that could allow malformed certificates to be incorrectly accepted as valid. This...
Mbed TLS 2.24.0 Patches Hostname Spoofing Hole That Leverages Crafted IP Certificates
In August 2020, the maintainers of the widely embedded Mbed TLS library released version 2.24.0 to fix a certificate validation flaw that could allow an attacker to impersonate any domain name by...
CVE-2025-40801: Siemens SALT Flaw Bypasses TLS Checking — What to Patch Now
Siemens on December 11, 2025 made public a dangerous oversight in its Advanced Licensing (SALT) Toolkit: the software fails to validate server certificates when establishing TLS connections,...
CVE-2025-58187: The Go Certificate Flaw Microsoft Flagged for Azure Linux — and Why It’s Not the Whole Picture
Microsoft has publicly confirmed that its Azure Linux distribution is potentially affected by CVE-2025-58187, a denial-of-service vulnerability in Go’s standard library. The March 2026 advisory,...
Siemens Solid Edge SE2025 CVE-2025-40744: Critical MitM Vulnerability Patched
Siemens has issued an urgent security advisory for Solid Edge SE2025 users, warning of a high-severity certificate validation vulnerability that could enable man-in-the-middle (MitM) attacks against...
Four Yealink IP Phone Vulnerabilities Expose Enterprise VoIP to Brute-Force and Certificate Attacks
Four newly disclosed security vulnerabilities in Yealink’s widely deployed IP phones and cloud-based Redirect and Provisioning Service (RPS) have thrust business communications security into urgent...