CVE-2025-26399
Analyzed
Published: 23 Sept 2025, 05:07
Last modified:10 Mar 2026, 03:55
Vulnerability Summary
Overall Risk (default)
high
70/100 CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
32.24% HIGH
32% probability +9.93%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected
Timeline
23 Sept 2025, 05:07
Published
Vulnerability first disclosed
09 Mar 2026, 00:00
Added to CISA KEV
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
10 Mar 2026, 03:55
Last Modified
Vulnerability information updated
12 Mar 2026, 00:00
CISA Remediation Due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
CVSS Metrics
- v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Trends
Current EPSS score: 32.24%• Percentile: 97%
Techniques & Countermeasures
- CWE-502•Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Affected Systems
- Unknown•Web Help Desk
12.8.7 and below | ≤ 12.8.6 | 12.8.7
References (4)
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399
- https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
- https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399