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9.8
CVSS
Critical

CVE-2025-26399

PUBLISHED

SolarWinds Web Help Desk Deserialization of Untrusted Data Privilege Escalation Vulnerability

1 day faster than CISA KEV

Exploited in the wild Remote Low complexity No user interaction
Vendor
SolarWinds
Product
Web Help Desk
Published
Sep 23, 2025
EPSS
30.5% · 97% pctl

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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.

cisa

Weaknesses (CWE)

  • CWE-502

    Deserialization of Untrusted Data

CVSS scores

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation status

Exploited in the wild

Recorded 2026-06-01 12:09:49 UTC · CVE

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CVE First 2026-06-01 12:09 UTC
CISA 2026-06-02 14:02 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel

  • KEV confirmed by CISA