CRITICALCVSS 9.8Actively exploited · CISA KEV since 2026-03-09Vulnerability

CVE-2025-26399

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.

Properties

Euvd product
Web Help Desk
Vulnerability name
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
First seen
2026-08-04T03:55:57+00:00
Cvss score
9.8
Epss score
0.9012
Last seen
2026-10-19T12:00:27+00:00
Due date
2026-03-12
Euvd assigner
SolarWinds
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2026-03-09T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2026-03-09
Score
9.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
SolarWinds
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
9.8

Related Entities (10)

MENTIONED_IN (5)

→[Campaign]March 2026 CVE Landscape: 31 High-Impact Vulnerabilities Identified, Interlock Ransomware Group Exploits Cisco FMC Zero-Day
→[Campaign]Determined Attacker Uploads Malicious Webshells to Parks and Rec Management Platform Servers
→[Campaign]Akira, LimeWire, and the Sour Taste of Data Exfiltration
→[Campaign]Unnamed campaign (ID 6989…)
→[Campaign]Active Exploitation of SolarWinds Web Help Desk (CVE-2025-26399)

AFFECTS_PRODUCT (2)

→[Product]cpe:2.3:a:solarwinds:web_help_desk:12.8.7:-:*:*:*:*:*:*
→[Product]cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Deserialization of Untrusted Data

INVOLVES (1)

←[Signal]kev_added · 2026-03-09

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CVE-2025-26399 (CVSS 9.8) — Ninja Signal Threat Intelligence | Ninja Signal