Why Microsoft issues emergency update for macOS and Linux ASP.NET threat
It can be exploited to allow unauthenticated attackers to forge authentication payloads during the HMAC validation process, which is used to verify the integrity and authenticity of data exchanged between a client and a server. Microsoft released an emergency patch for its ASP.NET Core to fix a high-severity vulnerability that allows unauthenticated attackers to gain SYSTEM privileges on devices that use the Web development framework to run Linux or macOS apps. The software maker said Tuesday evening that the vulnerability, tracked as CVE-2026-40372, affects versions 10.0.0 through 10.0.6 of the Microsoft.AspNetCore.DataProtection NuGet, a package that’s part of the framework. The critical flaw stems from a faulty verification of cryptographic signatures.
Beware: Forged credentials survive patching
During the time users ran a vulnerable version of the package, they were left open to an attack that would allow unauthenticated people to gain sensitive SYSTEM privileges that would allow full compromise of the underlying machine. Even after the vulnerability is patched, devices may still be compromised if authentication credentials created by a threat actor aren’t purged.Read full article Comments
Related Articles
- Unlock Exclusive Tech Insights: A Step-by-Step Guide to Subscribing to Tom’s Hardware Premium
- Accessibility Crisis: Good Designers Still Exclude Millions – Expert Calls for Recognition-Based Heuristics
- Giant 'Death Jar' Unearthed in Laos Reveals Generations of Human Remains
- Understanding Complex Systems with HASH: A Free Simulation Platform
- How to Navigate the Trump Administration's Visa Restrictions on Content Moderation Advocates
- 7 Key Lessons from Rebuilding GitHub Enterprise Server’s Search for High Availability
- Is Your Workplace Anxiety Contagious? Recognizing the Chicken Little Effect
- How to Stream Every Peanuts Classic and New Snoopy Film on Apple TV: A Complete Guide