Cisco FMC sftunnel Flaw Allows Root Code Execution
Cisco disclosed CVE-2026-20324, a critical vulnerability in Secure Firewall Management Center's sftunnel protocol. An authenticated, remote attacker with valid credentials can hijack the sftunnel connection or act as a registered peer to write a malicious file anywhere on the device, executing it as root. Cisco released software updates; no workarounds exist.
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