Resource exhaustion in Solarwinds Serv-u
CVE-2026-28318
SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust…
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Solarwinds Serv-u — versions 15.5.4, 15.5.4 and previous versions
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
- psirt@solarwinds.com (Vendor Advisory)
- psirt@solarwinds.com (Release Notes)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-28318?
- CVE-2026-28318 is a high-severity vulnerability in Solarwinds Serv-u, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-04.
- How severe is CVE-2026-28318?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-28318 known to be exploited?
- Yes. CVE-2026-28318 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-05), indicating it is being actively exploited.