Auth bypass in Solarwinds Serv-U
CVE-2026-28302
SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to privilege escalation and remote code execution as root. This issue requires group administrator access. The impact is lower in Windows deployments.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
- Solarwinds Serv-U — versions 15.5.4 HF1 and below
Weakness classification (CWE)
References
- www.solarwinds.com/trust-center/security-advisories/CVE-2026-28302 (vendor-advisory, Vendor Advisory)
- documentation.solarwinds.com/en/success_center/servu/content/release_notes/serv… (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2026-28302?
- CVE-2026-28302 is a critical-severity vulnerability in Solarwinds Serv-U, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.1/10. Published 2026-07-21.
- How severe is CVE-2026-28302?
- Critical severity. CVSS v3 base score is 9.1 out of 10.