importantSYS.SOURCE: The Hacker News• 2026-08-06T12:21:43+05:30

CISA Warns of Active Exploitation of TeamCity RCE Vulnerability CVE-2026-63077

#vulnerability #rce #cybersecurity #patching #teamcity

CISA has identified the TeamCity CVE-2026-63077 vulnerability, a critical remote code execution (RCE) flaw exploiting deserialization of untrusted data, currently under active exploitation. Federal agencies are urged to apply patches by August 8, 2026, per BOD 26-04 requirements.

A newly patched security flaw impacting on-premise versions of JetBrains TeamCity has come under active exploitation in the wild, according to the U.S. Cybersecurity and Infrastructure Security Agency (CISA).

The vulnerability in question is CVE-2026-63077 (CVSS score: 9.8), a case of deserialization of untrusted data that could allow an unauthenticated attacker with access to a TeamCity server

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