CVE-2026-28318

high

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

References

Exploits
More

https://www.securityweek.com/solarwinds-patches-exploited-serv-u-vulnerability/

https://www.helpnetsecurity.com/2026/06/08/cisa-patch-actively-exploited-solarwinds-serv-u-dos-vulnerability-cve-2026-28318/

https://thehackernews.com/2026/06/cisa-adds-actively-exploited-solarwinds.html

https://securityaffairs.com/193245/security/u-s-cisa-adds-solarwinds-serv-u-flaw-to-its-known-exploited-vulnerabilities-catalog.html

https://www.cisa.gov/news-events/alerts/2026/06/05/cisa-adds-one-known-exploited-vulnerability-catalog

https://www.bleepingcomputer.com/news/security/cisa-hackers-now-exploit-solarwinds-serv-u-flaw-to-crash-servers/

https://github.com/FCortezSecurity/AVEN

https://github.com/VixianSchool/nuclei-cve-check

https://github.com/BishopFox/CVE-2026-28318-check

https://github.com/jenniferreire26/CVE-2026-28318

https://github.com/johnniebozura31/CVE-2026-28318

https://github.com/cpt-ferna02/AVEN

https://github.com/AJings3c/Threat-Intelligence

https://github.com/cataam-security/cataam

https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm

Details

Source: Mitre, NVD

Published: 2026-06-04

Updated: 2026-07-22

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.40012