Exploited CVEs / CVE-2024-27198
CVE-2024-27198
JetBrains TeamCity Authentication Bypass Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2024-03-28 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited JetBrains TeamCity vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2024-03-07.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2024-27198
JetBrains TeamCity build servers can be fully hijacked through this authentication bypass, which lets an outsider perform admin actions, and ransomware groups moved on it within days of disclosure. A CI server is a software factory: admin access means poisoned builds, stolen source, and harvested deployment secrets all at once. CVSS 9.8, EPSS 100 percent, and a KEV entry from March 2024 make the urgency unambiguous.
Do this: Patch TeamCity, audit for rogue admin accounts and unexpected build agents, and rotate every secret the server could access if it was exposed while unpatched.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2024-27198
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2024-27198
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2024-03-28 (past due).
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2024-27198
Check the vendor's security advisory channel for the patched TeamCity versions and workarounds.
Common questions about CVE-2024-27198
Is CVE-2024-27198 actively exploited?
Yes. CVE-2024-27198 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2024-03-07, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2024-27198?
CISA set the federal (BOD 22-01) remediation due date at 2024-03-28, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2024-27198?
Check the vendor's security advisory for the patched TeamCity versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2024-27198?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2024-27198's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
More exploited JetBrains CVEs
The newest JetBrains entries on the CISA KEV catalog:
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
