CVE-2025-26399
CVSS v3
9.8
CRITICAL
EPSS Score
16.9 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.
CISA Known Exploited Vulnerability
- Date Added
- 2026-03-09
- Patch Due Date
- 2026-03-12
- Ransomware Use
- Unknown
Technical details
- Published
- 2025-09-23
Frequently asked questions
What is CVE-2025-26399?
SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986.
Is CVE-2025-26399 actively exploited?
Yes. CVE-2025-26399 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 3/12/2026.
What is the CVSS score for CVE-2025-26399?
CVE-2025-26399 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2025-26399 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 30 free checks/month · Free API key
Other 2025 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).