Cisco email security boxes can be rooted by... an email
Medium · The Register — Security ·
What happened
Cisco Email Security Appliances can be rooted by a crafted email; the critical flaw is already being exploited in the wild and attackers may be able to hide their tracks afterward.
What to do now
Apply Cisco's fixed release now using its advisory (CVE and versions are listed there); if you cannot patch immediately, isolate the appliance, restrict admin access to trusted networks, hunt logs for signs of compromise, and rotate credentials.
Original source
AI-assisted analysis, sources cited. Verify with the vendor advisory before acting.