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.
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.