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CVE-2026-63077critical

Rapid7 Analysis: Unauthenticated Remote Code Execution in JetBrains TeamCity (CVE-2026-63077)

On July 27, 2026, JetBrains issued a security advisory for CVE-2026-63077, a critical unsafe deserialization vulnerability affecting its TeamCity product. This flaw allows an unauthenticated attacker to achieve remote code execution by exploiting the agent polling protocol. An attacker capable of reaching a TeamCity server via HTTP or HTTPS can execute operating system commands with the…