Named Pipes Under Attack: Securing Windows Interprocess Communication
Microsoft patched two local privilege escalation vulnerabilities in Windows named pipes that could let an attacker run code at system level, the company said Tuesday.
Source: BleepingComputer · August 22, 2026 at 3:46 PM · AI-assisted report
Single-source
KUALA LUMPUR, 22 AUGUST 2026 —
Listen to this article
DomainFork Audio · read aloud
Microsoft patched two local privilege escalation vulnerabilities in Windows named pipes that could let an attacker run code at system level, the company said Tuesday.
Market Impact
The flaws, tracked as CVE-2024-21338 and CVE-2024-30080, allow a low-privilege user to escalate to LocalSystem by exploiting weaknesses in how Windows services handle named-pipe connections. Microsoft rated both critical with a CVSS score of 7.8.
Security researchers said the bugs show why developers should stop treating named pipes as private channels. “A named pipe only proves the client could open the pipe,” one researcher noted. “It doesn’t prove the client is the expected process or that the request is safe.”
Microsoft’s advisory told IT teams to review pipe permissions, separate authentication from authorization, and validate every message before processing. Broad access for Everyone or Authenticated Users should be replaced with least-privilege rules, the company said.
The update arrives as cyber-security teams in Malaysia brace for incoming audits that will test exposure to named-pipe interfaces. Bankers and insurers running Windows services on shared terminals should schedule patching within 30 days to meet sector guidelines, said a risk officer at a local lender.
Analysts added that the flaws underline a wider trend: local IPC channels once considered low risk now sit in attackers’ cross-hairs as malware pivots from remote exploits to abusing built-in OS features.