BugZero | Cisco BugID CSCuw90273 - Cannot telnet/ssh(Sessions max out)

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BugZero | Cisco BugID CSCuw90273 - Cannot telnet/ssh(Sessions max out)

ODD
Cisco
CSCuw90273

Cisco - Defect ID: CSCuw90273

Cannot telnet/ssh(Sessions max out)

ODD
Cisco
CSCuw90273

Cisco - Defect ID: CSCuw90273

Cannot telnet/ssh(Sessions max out)

Last updated on February 24th, 2026

BugZero Risk Score
7.8 High

Overall: 7.8

Severity: 8.2

Lifecycle: 9.1

Popularity: 4.6

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Bug Details

Views: 1

Description

Symptom

The vty sessions are being max out.

Conditions

This issue may happen when telnet/ssh client reloads or crashes when waiting in MORE prompt.

Workaround

Configure "service tcp-keepalives-in" or configure vtys with reasonable "absolute-timeout". This will ensure that the vtys will timeout.

Further Problem Description

Change history

2026-02-24 Removed: 15.2(03.07.03)PIH19

2026-02-24 Removed: 15.2(03.07.03)PIH19

2025-04-26 Added: 15.2(03.07.03)PIH19

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, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 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, 16.3.10, 16.3.11, 16.3.2, 16.3.3, 16.3.3a, 16.3.4, 16.3.5, 16.3.5a, 16.3.5b, 16.3.5c, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.4.1, 16.4.2, 16.4.3, 16.5.1, 16.5.1a, 16.5.1b, 16.5.2, 16.5.3, 16.6.1, 16.6.1a, 16.6.2, 16.6.2s, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5, 16.6.5a, 16.6.5b, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1a, 16.8.1b, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.2, 16.8.3, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1c, 16.9.1d, 16.9.1s, 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, 17.1.1, 17.1.1a, 17.1.1s, 17.1.1t, 17.1.2, 17.2.1, 17.2.1a, 17.2.1r, 17.2.1v, 17.2.2, 17.3.1, 17.3.1a, 17.3.2, 17.3.2a, 17.4.1, 17.4.1a, 3.13.10S_V154_3_S10_FC1, Everest-16.4.1

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, 16.12.1w, 16.12.1x, 16.12.1y, 16.12.1z, 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, 16.3.10, 16.3.11, 16.3.2, 16.3.3, 16.3.3a, 16.3.4, 16.3.5, 16.3.5a, 16.3.5b, 16.3.5c, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.4.1, 16.4.2, 16.4.3, 16.5.1, 16.5.1a, 16.5.1b, 16.5.2, 16.5.3, 16.6.1, 16.6.1a, 16.6.2, 16.6.2s, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5, 16.6.5a, 16.6.5b, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1a, 16.8.1b, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.2, 16.8.3, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1c, 16.9.1d, 16.9.1s, 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, 17.1.1, 17.1.1a, 17.1.1s, 17.1.1t, 17.1.2, 17.2.1, 17.2.1a, 17.2.1r, 17.2.1v, 17.2.2, 17.3.1, 17.3.1a, 17.3.2, 17.3.2a, 17.4.1, 17.4.1a, 3.13.10S_V154_3_S10_FC1, Everest-16.4.1

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