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
- 43.65% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 5 June 2026 · due 19 June 2026
- Weakness
- CWE-400
- Affected
- solarwinds/serv-u
- Source
- psirt@solarwinds.com
EPSS moved from 1.9% on 24 September 2026 to 43.7% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
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, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.