CVE-2026-28318
SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 19 June 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 40.01% probability · 99th percentile
- CISA KEV
- Listed 5 June 2026 · due 19 June 2026
- Weakness
- CWE-400
- Affected
- solarwinds/serv-u
- Source
- psirt@solarwinds.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://www.solarwinds.com/trust-center/security-advisories/cve-2026-28318 ; https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm#link7 ; https://nvd.nist.gov/vuln/detail/CVE-2026-28318
References
- https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htmRelease Notes
- https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.