Vulnerability details
CVE-2026-28318
Actively exploited
SolarWinds Serv-U
SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability
CVSS 3.1
7.5High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (SolarWinds) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| SolarWinds | Serv-U | v ≤ 15.5.4 | CVEProject cvelistV5 (CNA) |
References and advisories
3- 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
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318 government-resource
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Details
- Published
- 2026-06-04
- Last updated
- 2026-10-21
- State
- Published
- Assigner (CNA)
- SolarWinds
- Kolun priority
- 86 · Critical
CISA KEV catalog
- Date added
- 2026-06-05
- Due date
- 2026-06-19
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
48%
Probability of exploitation in 30 days
98.8%
Percentile (among all CVEs)
- 2026-11-0748%
- 2026-11-0343.65%
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-400Uncontrolled Resource Consumption