BugZero | F5 BugID 526492 - DNS resolution fails for Static and Optimized Tunn...

F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: Access Policy Manager

Description

Symptoms

When Static and Optimized Tunnels are used on Windows 10 desktop, accessing a backend server by hostname will fail.

Impact

No access to backend servers using hostnames.

Conditions

1. Windows 10 desktop 2. Static or Optimized Tunnels are used

Workaround

none

Fix Information

DNS resolution is successful for static and optimized tunnels on Microsoft Windows 10.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed versions: 12.1.0, 12.0.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.1.0, 12.0.0

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F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

F5 - Defect ID: 526492

DNS resolution fails for Static and Optimized Tunnels on Windows 10

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium