CVE-2026-63077

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 89.57%
EPSS Percentile: 99.79%
CISA KEV: YES — Known Exploited Vulnerability

Description

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

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve@jetbrains.com
Published: 28-Jul-2026 00:16
Last Modified: 06-Aug-2026 12:17
EPSS Date: 2026-10-12
CWE: CWE-502

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2026-08-05
Remediation Due: 2026-08-08
Known Ransomware Campaign Use: Known
Required Action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes: https://blog.jetbrains.com/teamcity/2026/07/cve-2026-63077/; https://www.jetbrains.com/privacy-security/issues-fixed/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-63077

Affected Products / Versions

jetbrains / teamcity
Version / affected range: * · before (exclusive) 2025.11.7
cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*
jetbrains / teamcity
Version / affected range: * · from (inclusive) 2026.1 · before (exclusive) 2026.1.3
cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 22:15
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (3)

CVE reference: CVE-2026-63077 Metasploit 6.5.4 Adds 16 Modules, Including Exploits for Five CISA KEV Vulnerabilities
CVE-2026-63077 Recorded Future Identifies 73 High-Impact Vulnerabilities in August, 70 Actively Exploited
The malicious actors successfully exploited a critical vulnerability, designated CVE-2026-63077, residing within the TeamCity installation hosted on the `api.cadence.jetbrains.com` server. JetBrains Says Attackers Exploited Unpatched TeamCity Vulnerability to Breach Cadence Server

CVE (81)

Malware (4)

People (17)

Threat Actors (1)

Vendors (22)

Products (33)

Tools (8)

Industries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.