patch-tuesday
Safeguard articles tagged "patch-tuesday" — guides, analysis, and best practices for software supply chain and application security.
10 articles
Squidbleed (CVE-2026-47729): A 1997 Default Comes Back to Bite Squid
A one-line FTP-parsing bug from 1997 lets any user of a shared Squid proxy read other people's cleartext HTTP requests. We break down the root cause, why ancient defaults survive, and how to remediate.
CVE-2026-20262: Cisco Catalyst SD-WAN Manager Zero-Day File-Write Exploited in the Wild
Cisco confirmed limited in-the-wild exploitation of CVE-2026-20262, an arbitrary file-write zero-day in Catalyst SD-WAN Manager, alongside CVE-2026-20245. Here's what the chain actually buys an attacker and why edge management planes keep ending up on the KEV list.
Defender 'RoguePlanet' Zero-Day (CVE-2026-50656): SYSTEM on Fully Patched Windows
A race condition in Microsoft Defender, dubbed RoguePlanet, reportedly hands attackers SYSTEM privileges on fully updated Windows. We break down what is confirmed, what is still hedged, and what to do while the patch is in development.
CVE-2026-45657: The Wormable-Class Windows Kernel RCE You Should Patch This Week
A CVSS 9.8 zero-day-grade remote code execution flaw in the Windows kernel's TCP/IP path lets unauthenticated attackers run code as SYSTEM with no user interaction. Here's what's confirmed, what's hype, and what to do now.
Patch Tuesday June 2026: ~200 Flaws, 6 Zero-Days, and a Wormable Kernel RCE
Microsoft's June 2026 Patch Tuesday is among the largest on record — roughly 200 fixes, six zero-days including one exploited in the wild, and a top-severity Windows Kernel RCE. Here's what actually matters.
CVE-2026-41089: The Unauthenticated Netlogon RCE That Owns Your Domain Controller
CVE-2026-41089 is a CVSS 9.8 unauthenticated remote code execution flaw in Windows Netlogon: an integer overflow in MS-NRPC handshake parsing leads to a stack overflow on domain controllers, with no credentials or user interaction required.
Microsoft May 2026 Patch Tuesday: No Zero-Days, but Two CVSS 9.8 Wormable RCEs
Microsoft's May 2026 Patch Tuesday shipped without a single exploited zero-day for the first time since June 2024, but it still carried two unauthenticated CVSS 9.8 remote code execution bugs in core Windows services that every domain should treat as emergency patches.
CVE-2019-0981: .NET Core remote code execution (second va...
CVE-2019-0981, the second variant of the April 2019 .NET Core RCE pair, let attackers run arbitrary code via a malicious file. Here's what to patch and why.
CVE-2020-0602: Denial of service in ASP.NET Core
A denial of service flaw in ASP.NET Core 3.0/3.1, patched January 2020. Unauthenticated, network-exploitable, high-severity impact on availability.
CVE-2024-0057: Certificate validation bypass in .NET X.50...
CVE-2024-0057 lets attackers forge X.509 certificates that bypass .NET's chain validation, risking spoofing in TLS and code-signing flows.