CVE-2026-28318 kev in the critical feed json
SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability
published 2026-06-04 5 mo ago modified 2026-10-21 19 d ago also EUVD-2026-34268
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Exploited
- added 2026-06-05
- epss
- 48.0%
- EPSS 48.0% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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
Patch / fix
cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- solarwinds serv-u 15.5.4
Timeline
- Published
- CISA SSVC: exploitation active
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 5 mo ago
- Patch by
- 2026-06-19 (4 mo ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- SolarWinds, Serv-U
- CISA name
- SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
48.00% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- SolarWinds Serv-U
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
solarwinds.com
/trust-center/security-advisories/CVE-2026-28318
vendor-advisory
-
documentation.solarwinds.com
/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm
release-notes
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318
government-resource, us-government-resource
Sources
- CVE List CVE-2026-28318
- NVD CVE-2026-28318
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.