CVE-2025-26399SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects SolarWinds Web Help Desk. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 9, 2026; federal agencies had to remediate by Mar 12, 2026, and it is known to be used in ransomware. Treat that date as your deadline.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-502
- Known exploited
- Added to CISA KEV Mar 9, 2026; federal remediation due Mar 12, 2026; known ransomware useApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 90.12% (percentile 100)
- Assigned by
- SolarWinds
- NVD analysis
- Analyzed
- Record last updated
- Aug 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
SolarWinds Web Help Desk solarwinds:web_help_desk (from the name) | 12.8.7 and below | CNA record |
solarwinds web_help_desk solarwinds:web_help_desk | through 12.8.6; 12.8.7 | NVD |
References
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399patch, vendor-advisory
- https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htmrelease-notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399us-government-resource
- https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.