CISA Warns of Cisco Secure Email Gateway Arbitrary File Write Vulnerability (CVE-2026-76519)

Cisco released a security advisory for a critical-severity vulnerability in the Cisco Secure Email Gateway. Tracked as CVE-2026-76519, the vulnerability may allow an attacker to write arbitrary files and execute commands with root privileges on the underlying operating system. CISA acknowledged the active exploitation of the vulnerability by adding it to its Known Exploited Vulnerabilities…

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