Answer in brief
CVE-2026-28318 records a High severity vulnerability in SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability. The current sources mark it as known exploited. The current feed maps SolarWinds/Serv-U (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps SolarWinds/Serv-U (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| SolarWinds/Serv-Ugeneric | 15.5.4 and previous versions | Not reported |
Published upstream
Jun 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 5, 2026
Added to CISA KEV
Jun 5, 2026
Evidence: source:kev:kev:kev:recordSolarWinds 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
Quoted source text, attributed separately from HOL analysis.