Critical Unauthenticated Remote Code Execution Flaw (CVE-2026-63077) in JetBrains TeamCity Actively Exploited

A critical unauthenticated remote code execution vulnerability, CVE-2026-63077, in JetBrains TeamCity is being actively exploited in the wild. CISA has added this flaw to its Known Exploited Vulnerabilities catalog, emphasizing the severe risk as attackers can execute OS commands without credentials. Proof-of-concept exploit code is now publicly available, urging immediate patching for affected TeamCity servers.