CVE-2026-28318
HighActively exploited (CISA KEV)
Description
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 Center if you are unable to deploy the update
SeverityHigh
CVSS7.5
Exploit probability—
Product
SolarWinds Serv-U
PublishedJun 4, 2026
First seenJun 4, 2026
Added to KEVJun 5, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
CISA 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.
CISA due date: Jun 19, 2026Update
- solarwinds serv-u15.5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| solarwinds serv-u | v < 15.5.4, 15.5.4 | 15.5.4 |
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