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.
- Vendor
- SolarWinds
- Product
- Serv-U
- CVSS
- 7.5
- EPSS (exploit probability)
- 1.9%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2026-28318 being exploited?
Yes. CISA added CVE-2026-28318 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 1.9% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other SolarWinds Serv-U CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2024-28995 SolarWinds Serv-U Path Traversal Vulnerability | [ HIGH ] | 8.6 | 99.6% | |
| CVE-2021-35247 SolarWinds Serv-U Improper Input Validation Vulnerability | [ MEDIUM ] | 4.3 | 3.5% | |
| CVE-2021-35211 SolarWinds Serv-U Remote Code Execution Vulnerabilityransomware use | [ CRITICAL ] | 9.0 | 91.2% |