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CISA: Ransomware gangs now exploiting critical TeamCity flaw

September 24, 2026 · BleepingComputer · Severity: CRITICAL

​The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned federal agencies on Wednesday that ransomware gangs are now also exploiting a critical JetBrains TeamCity vulnerability patched in July.

Key Takeaways

  • According to BleepingComputer, this development highlights evolving cybersecurity challenges that security teams should monitor for potential organizational impact.
  • Given the CRITICAL severity rating, organizations should prioritize remediation in their vulnerability management workflow and apply available patches urgently.
  • Security teams should review their exposure to this threat and implement appropriate defensive controls to protect their organization's infrastructure and data assets.
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