Deserialization in Solarwinds Web Help Desk
CVE-2025-40553
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.680 (99.3th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.604 · newest: 0.680 · change: +0.076
Affected products
- Solarwinds Web Help Desk — versions 12.8.8 HF1 and below
- Solarwinds Web Help Desk
Weakness classification (CWE)
References
- www.solarwinds.com/trust-center/security-advisories/CVE-2025-40553 (Vendor Advisory)
- documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_20… (release-notes, Release Notes)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
Frequently asked questions
- What is CVE-2025-40553?
- CVE-2025-40553 is a critical-severity vulnerability in Solarwinds Web Help Desk, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-01-28.
- How severe is CVE-2025-40553?
- Critical severity. CVSS v3 base score is 9.8 out of 10.