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CVE-2025-40551

SolarWinds Web Help Desk Deserialization of Untrusted Data

9.8 CRITICALActively exploited (CISA KEV)EPSS 84.2%
  1. Published28 Jan 2026
  2. Added to CISA KEV3 Feb 2026
  3. Remediation due6 Feb 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 3 Feb 2026Federal remediation due: 6 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

SolarWinds Web Help Desk< 2026.1

Remediation

Fixed in
SolarWinds Web Help Desk≥ 2026.1

References

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Frequently asked

Is CVE-2025-40551 being actively exploited?

Yes. CVE-2025-40551 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Feb 2026.

How severe is CVE-2025-40551?

CVE-2025-40551 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 84.2% probability of exploitation.

Which products are affected by CVE-2025-40551?

Affected products include SolarWinds Web Help Desk.

How do I fix CVE-2025-40551?

Upgrade affected software to a fixed version, for example SolarWinds Web Help Desk 2026.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-40551 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.