# CVE-2021-35211

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-35211
- CVSS: 9.0
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17; known ransomware use
- EPSS: 91.16% (percentile 99.8)
- Unvetted proof-of-concept code on GitHub: 3 GitHub proofs of concept · 1 Nuclei template (first 2021-09-30)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-04)
- Weakness: CWE-787
- Published: 2021-07-14

## Affected versions

- SolarWinds Serv-U Managed File Transfer Server and Serv-U Secured FTP: affected >= SolarWinds Serv-U and < 15.2.3 HF1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211
- [other] https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targeting-solarwinds-serv-u-software-with-0-day-exploit
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35211

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.