CVE-2025-40551

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.

Overview

State: PUBLISHED
Assigner (CNA): SolarWinds
CVSS severity: CRITICAL
CVSS score: 9.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score: 9.8 / 10 CRITICAL source: CNA overview
CWE(s): CWE-502
Reserved: 2025-04-16
Published: 2026-01-28 07:33 UTC
Last updated: 2026-02-26 15:04 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/40xxx/CVE-2025-40551.json
Linked Threat: CVE-2025-40551 — SolarWinds Web Help Desk: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability

CISA Known Exploited Vulnerabilities CISA KEV

CISA has confirmed in-the-wild exploitation of this CVE. Federal agencies must remediate by the due date below; private orgs should treat it as priority-1.

Vulnerability name: SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
Vendor / project: SolarWinds
Product: Web Help Desk
Date added to KEV: 2026-02-03
Remediation due: 2026-02-06
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.
Ransomware campaign use: Unknown
CISA notes: https://www.solarwinds.com/trust-center/security-advisories/cve-2025-40551 ; https://nvd.nist.gov/vuln/detail/CVE-2025-40551
CISA listing: www.cisa.gov/known-exploited-vulnerabilities-catalog

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-01-28 08:16:02 UTC
NVD last modified: 2026-02-04 02:00:02 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: psirt@solarwinds.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.8697 (probability of exploitation in next 30 days)
EPSS percentile: 99.45% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2025-206426
Assigner: SolarWinds
Published: Jan 28, 2026, 7:33:09 AM
Updated: Feb 26, 2026, 3:04:49 PM
EUVD base score (CVSS 3.1): 9.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS: 86.9700
Vendors: SolarWinds
Products: Web Help Desk (12.8.8 HF1 and below)
Aliases: GHSA-7qrj-j83p-3vqg

ENISA 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.

EUVD references (2)

Affected products (1)

Vendor	Product	Versions	Platforms
SolarWinds	Web Help Desk	`12.8.8 HF1 and below` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551 vendor-advisorypatch
https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm release-notes

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551 vendor-advisory, patch

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://attackerkb.com/topics/CVE-2025-40551 rapid7:attackerkb.com
https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm rapid7:documentation.solarwinds.com
https://www.cve.org/CVERecord?id=CVE-2025-40551 rapid7:www.cve.org

NVD-tagged references (3)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm psirt@solarwinds.com Release Notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551 134c704f-9b21-4f2e-91b3-4a467353bcc0 US Government Resource
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551 psirt@solarwinds.com Vendor Advisory

Indicators (2)

IOCs linked to the auto-promoted Threat row.

Type	Value	VirusTotal	Attached
cwe	`CWE-502`	no local data	2026-05-14 02:58 UTC
cve	`CVE-2025-40551`	no local data	2026-05-14 02:58 UTC

Remediations (9)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2025-40551 | SolarWinds Web Help Desk Vulnerability | UpGuard

web:www.upguard.com

Critical RCE vulnerability in SolarWinds Web Help Desk ( CVE-2025-40551 ) allows unauthenticated attackers to execute commands via deserialization.

2026-05-14 17:50 UTC
NVD - cve-2025-40551

web:nvd.nist.gov

An official website of the United States government Here's how you know

2026-05-14 17:50 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-14 17:50 UTC
A Deep Dive into the Critical SolarWinds Web Help Desk Vulnerability ...

web:securityboulevard.com

By safely exercising real-world exploitation logic, organizations can confirm exposure, prioritize remediation , and ensure that fixes fully prevent attacker access. The post A Deep Dive into the Critical SolarWinds Web Help Desk Vulnerability ( CVE-2025-40551 ) appeared first on Ridge Security.

2026-05-14 17:50 UTC
Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...

web:support.servicenow.com

Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

2026-05-14 17:50 UTC
Microsoft December 2025 Security Updates / FYI - Microsoft Q&A

web:learn.microsoft.com

Microsoft December 2025 Security Updates This release consists of the following 57 Microsoft CVEs : Tag CVE Base Score CVSS Vector Exploitability FAQs? Workarounds? Mitigations ? Windows PowerShell CVE - 2025 -54100 Windows Projected File System…

2026-05-14 17:50 UTC
SolarWinds RCE bug makes Cisa list as exploitation spreads

web:www.computerweekly.com

Exploitation of CVE-2025-40551 , an RCE flaw affecting SolarWinds Web Help Desk, appears to be spreading, with defenders on high alert.

2026-05-14 17:50 UTC
SolarWinds Web Help Desk Vulnerability Exploited (CVE-2025-40551)

web:www.esentire.com

THE THREAT On February 3rd, 2026, CISA added a recently disclosed critical vulnerability in SolarWinds Web Help Desk (WHD) to its Known Exploited Vulnerabilities (KEV) catalog. The flaw, tracked as CVE-2025-40551 (CVSS: 9.8), is an untrusted data deserialization vulnerability in WHD that can allow…

2026-05-14 17:50 UTC
CISA Required Action

CISA KEV

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Due date: 2026-02-06 Known ransomware campaign use: Unknown

2026-05-14 01:13 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2025-40551.json.

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