BugZero | Cisco BugID CSCvj50537 - ISSU Failure in Vz ME lab

Cisco - Defect ID: CSCvj50537

ISSU Failure in Vz ME lab

Cisco - Defect ID: CSCvj50537

ISSU Failure in Vz ME lab

Last updated on February 18th, 2026

BugZero Risk Score
7.8 High

Overall: 7.8

Severity: 8.2

Lifecycle: 9.1

Popularity: 5.1

What is the BugZero Risk Score?

Cisco Integration

Learn more about where this data comes from

Cisco Integration

Learn more

BugZero Plan

Streamline upgrades with automated vendor bug scrubs

BugZero Plan

Learn more

BugZero Prevent

Wish you caught this bug sooner? Get proactive today.

BugZero Prevent

Learn more

Bug Details

Description

Symptom

Slow memory leak - Router may not be able to upgrade via package mode or eventually might crash due to memory leak after running for many weeks.

Conditions

Netsync should have been configured with BITS input source

Workaround

Disable netsync with BITS input source.

Further Problem Description

Change history

2026-02-18 Removed: 16.6.5, 16.9.1

2022-02-13 Added: 16.6.5, 16.9.1

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 16.10.1, 16.10.1a, 16.10.1b, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.2, 16.10.3, 16.11.1, 16.11.1a, 16.11.1b, 16.11.1c, 16.11.1s, 16.11.2, 16.12.1, 16.12.1a, 16.12.1c, 16.12.1s, 16.12.1t, 16.12.1v, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 16.12.1z1, 16.12.1z2, 16.12.2, 16.12.2a, 16.12.2s, 16.12.2t, 16.12.3, 16.12.3a, 16.12.3s, 16.12.4, 16.12.4a, 16.12.5, 16.12.5a, 16.12.5b, 16.12.6, 16.12.6a, 16.12.7, 16.6.10, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.6.9, 16.9.2, 16.9.2a, 16.9.2s, 16.9.3, 16.9.3a, 16.9.3h, 16.9.3s, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.7, 16.9.8, 17.1.1, 17.1.1a, 17.1.1s, 17.1.1t, 17.1.2, 17.1.3, 17.2.1, 17.2.1LA, 17.2.1a, 17.2.1r, 17.2.1v, 17.2.2, 17.2.3, 17.3.1, 17.3.1a, 17.3.1w, 17.3.1x, 17.3.1z, 17.3.2, 17.3.2a, 17.3.3, 17.3.3a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.4.1, 17.4.1a, 17.4.1b, 17.4.1c, 17.4.2, 17.4.2a, 17.5.1, 17.5.1a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.2, 17.7.1, 17.7.1a, 17.7.1b, 3.18.5SP_BinOS, 3.18.6SP_BinOS

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 16.10.1, 16.10.1a, 16.10.1b, 16.10.1c, 16.10.1d, 16.10.1e, 16.10.1f, 16.10.1g, 16.10.1i, 16.10.1s, 16.10.2, 16.10.3, 16.11.1, 16.11.1a, 16.11.1b, 16.11.1c, 16.11.1s, 16.11.2, 16.12.1, 16.12.1a, 16.12.1c, 16.12.1s, 16.12.1t, 16.12.1v, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 16.12.1z1, 16.12.1z2, 16.12.2, 16.12.2a, 16.12.2s, 16.12.2t, 16.12.3, 16.12.3a, 16.12.3s, 16.12.4, 16.12.4a, 16.12.5, 16.12.5a, 16.12.5b, 16.12.6, 16.12.6a, 16.12.7, 16.6.10, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.6.9, 16.9.2, 16.9.2a, 16.9.2s, 16.9.3, 16.9.3a, 16.9.3h, 16.9.3s, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.7, 16.9.8, 17.1.1, 17.1.1a, 17.1.1s, 17.1.1t, 17.1.2, 17.1.3, 17.2.1, 17.2.1LA, 17.2.1a, 17.2.1r, 17.2.1v, 17.2.2, 17.2.3, 17.3.1, 17.3.1a, 17.3.1w, 17.3.1x, 17.3.1z, 17.3.2, 17.3.2a, 17.3.3, 17.3.3a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.4.1, 17.4.1a, 17.4.1b, 17.4.1c, 17.4.2, 17.4.2a, 17.5.1, 17.5.1a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.2, 17.7.1, 17.7.1a, 17.7.1b, 3.18.5SP_BinOS, 3.18.6SP_BinOS

Top Cisco Defects

9.7Defect ID: CSCwq31287
Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability
9.7Defect ID: CSCwj74769
After [non]pairwise key enabling and reboot, bfd ip and port mismatch on device.
9.7Defect ID: CSCwt50498
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
9.7Defect ID: CSCws61409
Live Logs Not Displaying on GUI Due to Fast Expansion of MNT Database
9.7Defect ID: CSCwe44571
FMC: GEOLOCATION size is causing upgrade failures

Ready to prevent the next vendor outage?

Get a demo

Links

Original Vendor Announcement

Cisco Integration

Learn more about where this data comes from

Cisco Integration

Learn more

BugZero Plan

Streamline upgrades with automated vendor bug scrubs

BugZero Plan

Learn more

BugZero Prevent

Wish you caught this bug sooner? Get proactive today.

BugZero Prevent

Learn more

Cisco - Defect ID: CSCvj50537

ISSU Failure in Vz ME lab

Cisco - Defect ID: CSCvj50537

ISSU Failure in Vz ME lab

Last updated on February 18th, 2026

BugZero Risk Score7.8 High

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Top Cisco Defects

Ready to prevent the next vendor outage?

Links

BugZero Risk Score
7.8 High