CVE-2021-35211
KEV RANSOMWARECRITICAL 10.0EPSS 91.2%
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.
- CVSS v3.1
- 10.0 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS v3.1
- 9.0 CRITICAL
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS v2.0
- 10.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C - EPSS
- 91.16% chance of exploitation in the next 30 days, 100th percentile
- CISA KEV
- added 2021-11-03, used in ransomware campaigns
- Nuclei
- critical
- Published
- 2021-07-14
- Updated
- 2025-10-21
Proof-of-concept exploits (4)
- https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-actor-targe…
- 0xhaggis/CVE-2021-352111★ · 2021-11-12
- BishopFox/CVE-2021-3521139★ · 2022-01-14
- NattiSamson/Serv-U-CVE-2021-3521112★ · 2021-09-30