June 2, 2022 · Applied Cybernetics Group
CVE-2022-26134 — Atlassian Confluence Server/Data Center
known ransomware use
Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability
- Added to KEV
2022-06-02- Federal due date
2022-06-06- Vendor
- Atlassian
- Product
- Confluence Server/Data Center
- EPSS
- 100.0th percentile (score 0.944, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2022-26134
CISA short description
Atlassian Confluence Server and Data Center contain a remote code execution vulnerability that allows for an unauthenticated attacker to perform remote code execution.
Required action
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.