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CVE-2026-28318

HIGH KEV CISA Exploitation: ACTIVE
7.5
CVSS 3.1
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

Metadata

CVE ID
CVE-2026-28318
State
PUBLISHED
Assigner
SolarWinds
Reserved
2026-02-26 14:46 UTC
Published
2026-06-04 14:05 UTC
Last updated
2026-06-06 03:55 UTC
Primary CWE
CWE-400
CWE-400 Uncontrolled Resource Consumption
Vendor / Product
SolarWinds / Serv-U
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC — CISA Coordinator
Exploitation
ACTIVE
Automatable
yes
Tech. Impact
partial
CISA Known Exploited Vulnerability
Vulnerability name
SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability
Vendor
SolarWinds
Product
Serv-U
Added to KEV
2026-06-05
Due date
2026-06-19
Ransomware
Not known
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 description
SolarWinds Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.
Affected products (1)
VendorProductPlatformVersions
SolarWinds Serv-U Windows,Linux 15.5.4 and previous versions
Weakness (CWE)
CWESourceDescription
CWE-400 cna CWE-400 Uncontrolled Resource Consumption
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (2)
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