CVE-2025-26399

high-risk
Published 2025-09-23

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.

Do I need to act?

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32.2% chance of exploitation in next 30 days
EPSS score — higher than 68% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Solarwinds

References (4)

Release Notes https://documentation.solarwinds.com/en/success_center/whd/content/release_notes...
Patch https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-...
Third Party Advisory https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-sol...
62
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 23/34 · High
Exposure 7/34 · Low