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CVE-2025-26399

96
FAUCET Score

CVE-2025-26399 is a critical unauthenticated remote code execution vulnerability affecting SolarWinds Web Help Desk, stemming from an AjaxProxy deserialization flaw that bypasses previous patches. With a CVSS score of 9.8, it allows attackers to execute arbitrary commands on the host machine over the network with low complexity and no user interaction or privileges required. This vulnerability is actively exploited in the wild, listed on CISA's KEV catalog, and has confirmed exploit code available, leading to urgent patch deadlines for federal agencies.

Impacted Technologies

VendorProductVersion(s)CPE
<= 12.8.6CPE matchmatch criteria
cpe:2.3:a:solarwinds:web_help_desk:*:*:*:*:*:*:*:*
12.8.7CPE matchmatch criteria
cpe:2.3:a:solarwinds:web_help_desk:12.8.7:-:*:*:*:*:*:*

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
88.33%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Mar 9, 2026
This CVE's current EPSS score of 0.8833 is in the 99th 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

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
microsoft.com / en-us/security/blog/2026/02/06/active-exploitation-solarwinds-web-help-desk
Third Party Advisory
documentation.solarwinds.com / en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
Release Notes
solarwinds.com / trust-center/security-advisories/CVE-2025-26399
PatchVendor Advisory