Home / Vulnerabilities / CVE-2025-26399
CRITICAL SEVERITY
CVE-2025-26399SolarWinds · Web Help Desk

SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

Technical Severity

CVSS v3.1 Metrics

CRITICAL
9.8 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Likelihood

EPSS Prediction

28.24 %
Predictive Probability
Percentile Rank
96.5 th

Documented as more likely to be exploited than 96.5% of known CVEs.

Detection Date

Mar 09, 2026

Remediation Due

Mar 12, 2026

CISA Catalog Active

Threat Analysis

SolarWinds Web Help Desk contain a deserialization of untrusted data vulnerability in AjaxProxy that could allow an attacker to run commands on the host machine.

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

External Intelligence

https://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399

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://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-26399