# CVE-2026-28318

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

- Page: https://www.vulneraibility.com/cve/CVE-2026-28318
- CVSS: 7.5
- Known exploited: yes, in CISA KEV since 2026-06-05; CISA due date 2026-06-19
- EPSS: 43.65%
- Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept (first 2026-06-10)
- CISA SSVC: exploitation active, automatable yes, technical impact partial (assessed 2026-06-05)
- Weakness: CWE-400
- Published: 2026-06-04

## Affected versions

- SolarWinds Serv-U: affected <= 15.5.4

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318
- [other] https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.