CVE-2025-40551

Name: CVE-2025-40551
Creator: NVD / NIST
Published: 2026-01-28T08:16:02.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 84.13%

Last modified Jun 17, 2026

CVE-2025-40551 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 84.13% chance of exploitation in the next 30 days.

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.

Metrics

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

EPSS Probability

84.13%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Feb 6, 2026.

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Solarwinds	Web Help Desk	< 2026.1

References

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

Timeline

Published: Jan 28, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-40551?

How severe is CVE-2025-40551?

CVE-2025-40551 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 84.13% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-40551?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-40551?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST