CVE-2025-26399
CRITICAL CISA KEV EPSS 99.8%
Published Sep 23, 20259mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Published Sep 23, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Mar 9, 2026 3mo ago
KEV Due Mar 12, 2026 110d overdue
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
CISA Known Exploited Overdue 110d
- Added
- Mar 9, 2026
- Due
- Mar 12, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS Exploit Probability
99.8% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available
Weaknesses 1
CWE-502 Deserialization of Untrusted Data Validation
Affected Products 2
| Vendor | Product | Version | Range |
|---|---|---|---|
| solarwinds | web_help_desk | * | ≤12.8.6 |
| solarwinds | web_help_desk | 12.8.7 | any |
References 4
- documentation.solarwinds.com https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26399
- microsoft.com https://www.microsoft.com/en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk/
- solarwinds.com https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399
Remediation
- solarwinds.com https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399