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CVE-2025-40551

98
FAUCET Score

CVE-2025-40551 is a critical untrusted data deserialization vulnerability in SolarWinds Web Help Desk, allowing unauthenticated remote code execution. With a CVSS score of 9.8, this flaw enables attackers to run arbitrary commands on the host machine with high impact on confidentiality, integrity, and availability. The vulnerability is actively exploited in the wild, with public Metasploit modules and Nuclei templates available, and has garnered significant community discussion and media coverage. Its high EPSS and FAUCET Risk Score further underscore the urgency of addressing this critical security issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 2026.1CPE matchmatch criteria
cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
83.62%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Feb 3, 2026
Metasploit: SolarWinds Web Help Desk unauthenticated RCE · Jan 28, 2026
Nuclei: CVE-2025-40551 · Jan 29, 2026
This CVE's current EPSS score of 0.8362 is in the 98th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

applepatch availablevia llm_extracted
Fixed in: 2026.1

Vendor Advisories (1)

applellm-apple-2a42765b5795ad66CRITICAL

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

Jan 28, 2026

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
documentation.solarwinds.com / en/success_center/whd/content/release_notes/whd_2026-1_release_notes.htm
Release Notes
solarwinds.com / trust-center/security-advisories/CVE-2025-40551
Vendor Advisory