CISA is aware of a vulnerability in SonicWall Secure Mobile Access (SMA) 100 series products. SMA 100 series products provide an organization’s employees with remote access to internal resources. SonicWall security and engineering teams have confirmed a zero-day vulnerability that was reported by a third-party threat research team on Sunday, January 31, 2021. This vulnerability impacts only SMA 100 series devices with firmware version 10.x, and SonicWall is working on a patch that is expected to be released by end of day Tuesday, February 2, 2021.
Earlier reports about other zero-day vulnerabilities remain unconfirmed and are still under investigation.
CISA encourages users and administrators to review the SonicWall security advisory and apply the necessary mitigations and patches when they become available. CISA also encourages users and administrators to monitor the SonicWall advisory for updates as new information becomes available.
As a risk-reduction measure, CISA recommends organizations implement multi-factor authentication on all virtual private network connections.