CVE-2021-35211 on CISA KEV

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

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• www.solarwinds.com — https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211
• www.microsoft.com — https://www.microsoft.com/security/blog/2021/07/13/microsoft-discovers-threat-ac…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
SolarWinds	Serv	U Managed File Transfer Server and Serv-U Secured FTP — SolarWinds Serv-U

06Detection

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