CVE-2021-35211 KEV
9.0
CRITICAL · CVSS 3.1 · EPSS 91.2% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2021-11-17.
Description
Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability. If exploited, a threat actor may be able to gain privileged access to the machine hosting Serv-U Only. SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 are affected by this vulnerability.
Scoring
| CVSS | 9.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 91.16% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | yes — remediate by 2021-11-17 |
| Public exploit | none known |
| Published | 2021-07-14 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | SolarWinds Serv-U Remote Code Execution Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2021-11-17 |
| Vendor / product | SolarWinds / Serv-U |
| Ransomware use | known |
Affected (1)
| Vendor | Product |
|---|---|
| solarwinds | serv-u |
References
- https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit
- https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211
- https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit
- https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35211
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