Dashboard / CVE-2026-63077

CVE-2026-63077

CRITICAL CISA KEV RANSOMWARE
ACT NOW Priority: 9.17 BB Relevance: 90/100
Published: 2026-07-27 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.

CISA Known Exploited Vulnerability

Vendor / Product JetBrains — TeamCity
Date Added 2026-08-05
Remediation Due 2026-08-08
Ransomware Use CONFIRMED
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

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
jetbrains teamcity < 2025.11.7
jetbrains teamcity 2026.1 – 2026.1.3

References & Advisories (2)

Bug Bounty Relevance

90 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ Known exploited (KEV)
✓ High exploitation probability

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

93.56%
Raw Score 0.935580
Percentile 99.8%
Date 2026-10-28

Intelligence Sources

kev ref →
nvd ref →

External Links