BugZero | Cisco BugID CSCws66188 - Snort3 Crash During Mercury Reload While Upgrading...

Cisco - Defect ID: CSCws66188

Snort3 Crash During Mercury Reload While Upgrading from VDB 419 to 420

Cisco - Defect ID: CSCws66188

Snort3 Crash During Mercury Reload While Upgrading from VDB 419 to 420

Last updated on February 19th, 2026

BugZero Risk Score
7.4 High

Overall: 7.4

Severity: 8.2

Lifecycle: 4.6

Popularity: 4.6

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Bug Details

Description

Symptom

Snort3 traceback, then a failover event was experienced on the HA environment,

Conditions

FMC: Virtual - Version: 7.7.10.1 with FTD 1120 v7.7.10.1 (build 5)

Workaround

Disable EVE.

Further Problem Description

TBD

Change history

2026-01-15 Added: 3.3.5.1000

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Cisco - Defect ID: CSCws66188

Snort3 Crash During Mercury Reload While Upgrading from VDB 419 to 420

Cisco - Defect ID: CSCws66188

Snort3 Crash During Mercury Reload While Upgrading from VDB 419 to 420

Last updated on February 19th, 2026

BugZero Risk Score7.4 High

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Links

Top Cisco Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
7.4 High