CVE-2026-28318
SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability
CVSS Score
7.5
EPSS Score
0.1%
EPSS Percentile
20th
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
| CWE | CWE-400 |
| Vendor | solarwinds |
| Product | serv-u |
| Published | Jun 4, 2026 |
| Last Updated | Jun 6, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
SolarWinds / Serv-U
15.5.4 and previous versions
References
solarwinds.com: https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318 documentation.solarwinds.com: https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318