BugZero | F5 BugID 1077553 - Traffic matches the wrong virtual server after mod...

F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

Last updated on July 18th, 2026

BugZero Risk Score
6.7 Medium

Overall: 6.7

Severity: 7.3

Community: 4.2

Lifecycle: 7.0

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: Local Traffic Manager

Description

Symptoms

Traffic matches the wrong virtual server.

Impact

Traffic may be directed to the wrong backend server.

Conditions

A virtual server configured to match any port is modified to matching a specific port. Alternatively, a virtual server matching a specific port is modified to match any port.

Workaround

Restart the TMM after the config change.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions:14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 17.0.0, 17.0.0.1, 17.0.0.2

Fixed versions: 17.1.0, 16.1.4, 15.1.9

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 17.1.0, 16.1.4, 15.1.9

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F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

Last updated on July 18th, 2026

BugZero Risk Score6.7 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

F5 - Defect ID: 1077553

Traffic matches the wrong virtual server after modifying the port matching configuration

Last updated on July 18th, 2026

BugZero Risk Score6.7 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.7 Medium

BugZero Risk Score
6.7 Medium