Critical 9.8Known exploited (CISA KEV)Published Jan 28, 2026

CVE-2025-40551SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability

Updated under an hour ago (2026-10-19 05:50 UTC)

Does this affect you?

It affects SolarWinds Web Help Desk. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Feb 3, 2026; federal agencies had to remediate by Feb 6, 2026. Treat that date as your deadline.

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Every CVE for SolarWinds Web Help Desk

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Added to CISA KEV Feb 3, 2026; federal remediation due Feb 6, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 84.18% (percentile 100)
Assigned by: SolarWinds
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

SolarWinds Web Help Desk solarwinds:web_help_desk (from the name)	12.8.8 HF1 and below	CNA record
solarwinds web_help_desk solarwinds:web_help_desk	before 2026.1	NVD

References

https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40551vendor-advisory, patch
https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htmrelease-notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40551us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.