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ExploitedIn CISA KEVFix available

CVE-2025-40551

SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability

Exploitation confirmed. First attested on 2026-02-03 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2026-01-28
  • Fixed in2026.1
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-01-2808:16CVE publishedNVD
  2. 2026-02-03Added to the CISA KEV catalogCISA KEV
  3. 2026-02-03Listed as exploited by GCVEGCVE
  4. 2026-02-03Exploitation first reportedCISA KEV
  5. 2026-02-0404:55SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Solarwinds web help desk
BranchAffectedFixed in
2026.1< 2026.12026.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As SolarWinds, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • SolarWinds Web Help Deskother versions: affected
    Affected
    • = 12.8.8 HF1 and belowno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-01-28

Fix

  1. Update Solarwinds web help desk to 2026.1
  2. CISA’s 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.due 2026-02-06

Advisories and patches

Detection

read 2026-11-08 06:29 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
1 moduleexploit/multi/http/solarwinds_webhelpdesk_rcerank: greatModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-02-03
Patch Due Date
2026-02-06
Ransomware Use
Unknown
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.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-01-28
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-7qrj-j83p-3vqg

Frequently asked questions

What is CVE-2025-40551?

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.

Is CVE-2025-40551 actively exploited?

Yes. CVE-2025-40551 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-02-06.

What is the CVSS score for CVE-2025-40551?

CVE-2025-40551 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record