CVE-2025-26399

Sept. 24, 2025, 6:11 p.m.

9.8
Critical

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.

Product(s) Impacted

Vendor Product Versions
Solarwinds
  • Web Help Desk
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-502
Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a solarwinds web_help_desk / / / / / / / /

References

https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26399

Tags

CWE-502
[email protected]
2025-09-23
CVE-2025-26399

CVSS Score

9.8 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

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

    View Vector String

Timeline

Published: Sept. 23, 2025, 5:15 a.m.
Last Modified: Sept. 24, 2025, 6:11 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

Linked Attack Reports

Active Exploitation of SolarWinds Web Help Desk (CVE-2025-26399)

Threat actors are actively exploiting a vulnerability in SolarWinds Web Help Desk, targeting organizations using versions prior to 12.8.7 HF1. The attack chain involves deploying Zoho ManageEngine RMM agents, Velociraptor for command and control, and Cloudflare tunnels for persistence. Attackers us…
cloudflare
CVE-2025-26399
velociraptor
CVE-2025-40536
CVE-2025-40551
2026-02-09
elastic cloud
solarwinds
web help desk
Published: February 9, 2026
Linked vulnerabilities : CVE-2025-26399 (CVSS 9.8), CVE-2025-40536 (CVSS 8.1), CVE-2025-40551 (CVSS 9.8)
Downloadable IOCs: 5

March 2026 CVE Landscape: 31 High-Impact Vulnerabilities Identified, Interlock Ransomware Group Exploits Cisco FMC Zero-Day

In March 2026, 31 high-impact vulnerabilities were identified requiring prioritization for remediation, with 29 receiving Very Critical Risk Scores. Affected vendors included Cisco, Microsoft, Google, ConnectWise, and others, with Microsoft and Apple accounting for approximately 32% of vulnerabilit…
ransomware
remote code execution
deserialization vulnerability
CVE-2025-32432
CVE-2025-54068
CVE-2025-26399
CVE-2025-53521
CVE-2025-68613
CVE-2026-20963
CVE-2026-27483
CVE-2026-21385
CVE-2021-30952
CVE-2023-41974
plasmagrid
CVE-2026-20131
CVE-2026-27944
CVE-2017-7921
CVE-2026-21262
CVE-2026-25187
CVE-2026-26127
CVE-2026-3909
CVE-2026-3910
CVE-2026-3564
ghostblade
ghostknife
ghostsaber
CVE-2026-33017
CVE-2026-3055
CVE-2026-33634
CVE-2026-33032
2026-04-14
cisco fmc
ios exploit kit
plasmaloader
zero-day exploitation
Published: April 14, 2026
Linked vulnerabilities : CVE-2025-32432 (CVSS 10.0), CVE-2025-54068 (CVSS 9.2), CVE-2025-26399 (CVSS 9.8), CVE-2025-53521 (CVSS 8.7), CVE-2025-68613 (CVSS 9.9), CVE-2026-20963 (CVSS 8.8), CVE-2026-27483 (CVSS 8.8), CVE-2026-21385 (CVSS 7.8), CVE-2023-41974, CVE-2021-30952, CVE-2026-20131 (CVSS 10.0), CVE-2026-27944 (CVSS 9.8), CVE-2017-7921, CVE-2026-21262 (CVSS 8.8), CVE-2026-25187 (CVSS 7.8), CVE-2026-26127 (CVSS 7.5), CVE-2026-3909 (CVSS 8.8), CVE-2026-3910 (CVSS 8.8), CVE-2026-3564 (CVSS 9.0), CVE-2026-33017 (CVSS 9.3), CVE-2026-3055 (CVSS 9.3), CVE-2026-33634 (CVSS 9.4), CVE-2026-33032 (CVSS 9.8)
Downloadable IOCs: 2

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.