No. CVE-2026-76418
A crafted request can make Cisco firewalls restart
Being used now
Yes. Attackers are using this right now.
Organizations using Cisco Secure Firewall ASA or FTD devices.
What to do
Apply Cisco's security update for your firewall and confirm the fix with Cisco's advisory.
Confirmed in attacksOct 29, 2026
ProductCisco Secure Firewall ASA Software and Cisco Secure FTD Software
Social interactions12K
Attack likelihood, next 30 daysunder 1%
Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.
The official description
Cisco Secure Firewall ASA Software and Cisco Secure FTD Software contains an unchecked return value to NULL pointer dereference vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
For your tech helper or AI assistant
A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.
Read-only check, change nothing, send nothing anywhere.
Is Cisco Secure Firewall ASA Software and Cisco Secure FTD Software (CVE-2026-76418) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-76418. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.