CRITICAL CISA KEV

CVE-2026-63077

CVSS v3

9.8

CRITICAL

EPSS Score

89.6 %

exploit probability, as of 2026-10-04

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

CISA Known Exploited Vulnerability

Date Added: 2026-08-05
Patch Due Date: 2026-08-08
Ransomware Use: Unknown

Technical details

Published: 2026-07-27
Last Modified: 2026-07-28

Frequently asked questions

What is CVE-2026-63077?

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

Is CVE-2026-63077 actively exploited?

Yes. CVE-2026-63077 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-08.

What is the CVSS score for CVE-2026-63077?

CVE-2026-63077 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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