Risk Letters

Exploited vulnerability

CVE-2026-28318

TLP:CLEAR

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

SolarWinds Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.

Facts

  • Vendor: SolarWinds
  • Product: Serv-U
  • CVSS: 7.5
  • EPSS (probability of exploitation within 30 days): 43.7 %
  • On CISA's Known Exploited Vulnerabilities list since: 5 June 2026
  • First known exploitation: 5 June 2026
  • CISA's deadline for US federal agencies: 19 June 2026
  • Weakness: CWE-400
  • First seen by Risk Letters: 5 June 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD