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Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2025-40551
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability - [Actively Exploited]
Description

SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

INFO

Published Date :

Jan. 28, 2026, 8:16 a.m.

Last Modified :

Feb. 3, 2026, 9:13 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

SolarWinds Web Help Desk contains a deserialization of untrusted data vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.

Required Action :

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

Notes :

https://www.solarwinds.com/trust-center/security-advisories/cve-2025-40551 ; https://nvd.nist.gov/vuln/detail/CVE-2025-40551

Affected Products

The following products are affected by CVE-2025-40551 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Solarwinds web_help_desk
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL 49f11609-934d-4621-84e6-e02e032104d6
CVSS 3.1 CRITICAL [email protected]
CVSS 3.1 CRITICAL MITRE-CVE
Solution
Address untrusted data deserialization to prevent remote code execution. Update the software.
  • Update SolarWinds Web Help Desk to the latest version.
  • Apply vendor-provided security patches.
  • Review system logs for suspicious activity.
  • Restrict access to the affected system.
Public PoC/Exploit Available at Github

CVE-2025-40551 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-40551.

URL Resource
https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm Release Notes
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-40551 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-40551 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

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Hunt3r850/CiberScan-Tool

Herramienta automatizada de ciberseguridad para escaneo de redes y detección de vulnerabilidades

Python Shell

Updated: 1 week, 5 days ago
0 stars 0 fork 0 watcher
Born at : June 6, 2025, 6:23 p.m. This repo has been linked 5 different CVEs too.
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hsvhora/research_blogs

Links of research blogs published by me.

Updated: 1 week ago
0 stars 0 fork 0 watcher
Born at : April 16, 2025, 9:30 a.m. This repo has been linked 24 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-40551 vulnerability anywhere in the article.

  • The Hacker News
Researchers Observe In-the-Wild Exploitation of BeyondTrust CVSS 9.9 Vulnerability

Threat actors have started to exploit a recently disclosed critical security flaw impacting BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) products, according to watchTowr. "Overni ... Read more

Published Date: Feb 13, 2026 (6 days, 17 hours ago)
  • Daily CyberSecurity
Virtual Invasion: SolarWinds WHD Exploited to Host Hidden QEMU VMs

Image: Microsoft In a striking display of “living off the land” gone wrong, threat actors are turning legitimate administrative tools into stealthy backdoors. The Microsoft Defender Research Team has ... Read more

Published Date: Feb 10, 2026 (1 week, 3 days ago)
  • The Register
Someone's attacking SolarWinds WHD to steal high‑privilege credentials - but we don't know who or how

Digital intruders exploited buggy SolarWinds Web Help Desk (WHD) instances in December to break into victims' IT environments, move laterally, and steal high-privilege credentials, according to Micros ... Read more

Published Date: Feb 09, 2026 (1 week, 3 days ago)
  • security.nl
Microsoft meldt aanvallen op SolarWinds Help Desk-installaties

Aanvallers hebben in december aanvallen uitgevoerd tegen SolarWinds Help Desk-installaties, zo meldt Microsoft. Welke kwetsbaarheden de aanvallers daarbij gebruikten is volgens het techbedrijf onduide ... Read more

Published Date: Feb 09, 2026 (1 week, 3 days ago)
  • The Hacker News
SolarWinds Web Help Desk Exploited for RCE in Multi-Stage Attacks on Exposed Servers

Microsoft has revealed that it observed a multi‑stage intrusion that involved the threat actors exploiting internet‑exposed SolarWinds Web Help Desk (WHD) instances to obtain initial access and move l ... Read more

Published Date: Feb 09, 2026 (1 week, 3 days ago)
  • CybersecurityNews
Hackers Actively Exploiting SolarWinds Web Help Desk RCE Vulnerability to Deploy Custom Tools

SolarWinds Vulnerability Actively Exploited Active exploitation of a remote code execution (RCE) vulnerability in SolarWinds Web Help Desk (WHD) is accelerating, with attackers rapidly weaponizing com ... Read more

Published Date: Feb 09, 2026 (1 week, 3 days ago)
  • CybersecurityNews
Cybersecurity Weekly Newsletter – Notepad++ hack, Office 0-Day, ESXi 0-day Ransomware Attacks and More

Cybersecurity Newsletter Weekly February Welcome to this week’s pulse on the cyber threat landscape, where vulnerabilities strike fast, and defenders must move faster. Notepad++ users face a supply-ch ... Read more

Published Date: Feb 08, 2026 (1 week, 4 days ago)
  • CybersecurityNews
170+ SolarWinds Help Desk Installations Vulnerable to RCE Attacks Exposed Online

SolarWinds Help Desk Installations Vulnerable Over 170 SolarWinds Web Help Desk installations remain vulnerable to a critical remote code execution (RCE) flaw that has been actively exploited in the w ... Read more

Published Date: Feb 05, 2026 (2 weeks ago)
  • The Register
Critical SolarWinds Web Help Desk bug under attack

Attackers are exploiting a critical SolarWinds Web Help Desk bug - less than a week after the vendor disclosed and fixed the 9.8-rated flaw. That's according to America's lead cyber-defense agency, wh ... Read more

Published Date: Feb 04, 2026 (2 weeks, 1 day ago)
  • security.nl
VS meldt actief misbruik van kritiek lek in SolarWinds Web Help Desk

Aanvallers maken actief misbruik van een kritieke kwetsbaarheid in SolarWinds Web Help Desk, zo waarschuwt het Amerikaanse cyberagentschap CISA. Amerikaanse overheidsinstanties zijn gisteren door het ... Read more

Published Date: Feb 04, 2026 (2 weeks, 1 day ago)
  • CybersecurityNews
CISA Warns of SolarWinds Web Help Desk RCE Vulnerability Exploited in Attacks

CISA Warns SolarWinds Web Help Desk Vulnerability An urgent warning regarding a critical remote code execution (RCE) vulnerability in SolarWinds Web Help Desk. The vulnerability, tracked as CVE-2025-4 ... Read more

Published Date: Feb 04, 2026 (2 weeks, 1 day ago)
  • The Hacker News
CISA Adds Actively Exploited SolarWinds Web Help Desk RCE to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added a critical security flaw impacting SolarWinds Web Help Desk (WHD) to its Known Exploited Vulnerabilities (KEV) catalog ... Read more

Published Date: Feb 04, 2026 (2 weeks, 1 day ago)
  • TheCyberThrone
CISA’s adds 4 vulnerabilitis to KEV Catalog

On February 3, 2026, the Cybersecurity and Infrastructure Security Agency (CISA) updated its Known Exploited Vulnerabilities (KEV) Catalog with four significant vulnerabilities—each backed by evidence ... Read more

Published Date: Feb 04, 2026 (2 weeks, 2 days ago)
  • BleepingComputer
CISA flags critical SolarWinds RCE flaw as exploited in attacks

CISA has flagged a critical SolarWinds Web Help Desk vulnerability as actively exploited in attacks and ordered federal agencies to patch their systems within three days. Tracked as CVE-2025-40551, th ... Read more

Published Date: Feb 03, 2026 (2 weeks, 2 days ago)
  • TheCyberThrone
Critical SolarWinds Web Help Desk Vulnerabilities

January 30, 2026SolarWinds has released a critical security advisory addressing multiple severe vulnerabilities in its Web Help Desk (WHD) platform that impact versions prior to 2026.1. Among the six ... Read more

Published Date: Jan 30, 2026 (2 weeks, 6 days ago)
  • Help Net Security
SolarWinds fixes critical Web Help Desk RCE vulnerabilities, upgrade ASAP!

SolarWinds has fixed six critical and high-severity vulnerabilities in its popular Web Help Desk (WHD) support ticketing and asset management solution, and is urging customers to upgrade to v2026.1 as ... Read more

Published Date: Jan 29, 2026 (3 weeks ago)
  • The Hacker News
SolarWinds Fixes Four Critical Web Help Desk Flaws With Unauthenticated RCE and Auth Bypass

SolarWinds has released security updates to address multiple security vulnerabilities impacting SolarWinds Web Help Desk, including four critical vulnerabilities that could result in authentication by ... Read more

Published Date: Jan 29, 2026 (3 weeks ago)
  • CybersecurityNews
Critical Solarwinds Web Vulnerability Allows Remote Code Execution and Security Bypass

Multiple critical vulnerabilities in SolarWinds Web Help Desk (WHD), culminating in unauthenticated remote code execution (RCE) via Java deserialization in CVE-2025-40551, were uncovered by Horizon3.a ... Read more

Published Date: Jan 29, 2026 (3 weeks ago)
  • reddit.com
CVE-2025-40551: SolarWinds WebHelpDesk RCE Deep-Dive and Indicators of Compromise

Let us know your cookie preferences Reddit uses cookies and similar technologies to: Keep the website operational and running properly Prevent fraud and abuse Monitor site usage and performance metric ... Read more

Published Date: Jan 28, 2026 (3 weeks, 1 day ago)
  • security.nl
SolarWinds waarschuwt voor kritieke kwetsbaarheden in Web Help Desk

Softwarebedrijf SolarWinds waarschuwt voor verschillende kritieke kwetsbaarheden in Web Help Desk waardoor ongeauthenticeerde aanvallers systemen op afstand kunnen overnemen. Ook bevat de software har ... Read more

Published Date: Jan 28, 2026 (3 weeks, 1 day ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-40551 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Feb. 03, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:* versions up to (excluding) 2026.1
    Added Reference Type SolarWinds: https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm Types: Release Notes
    Added Reference Type SolarWinds: https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551 Types: Vendor Advisory
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Feb. 03, 2026

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551
  • New CVE Received by [email protected]

    Jan. 28, 2026

    Action Type Old Value New Value
    Added Description SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-502
    Added Reference https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm
    Added Reference https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact