Linux
telnet security updates
Patch Radar has 7 security fixes for telnet, closing 5 CVEs, 1 of which is being exploited. The newest is telnet 0.17+2.5-3ubuntu4.2 (0.17+2.5-3ubuntu4.2), released March 16, 2026.
1 exploited CVEs
Latest version
n/a
Release date not known
Security fixes
7
On record in Patch Radar
CVEs
5
Closed by those fixes
Exploited
1
Vendor report or CISA KEV
Security fixes, newest first
| Priority | Fix | Release | Fixed in | CVEs | Exploited | Released |
|---|---|---|---|---|---|---|
| Urgent | telnet 0.17+2.5-3ubuntu4.2 | Ubuntu 24.04.5 LTS (noble) | 0.17+2.5-3ubuntu4.2 | 3 | Mar 16, 2026 | |
| Urgent | telnet 0.17+2.6-1ubuntu3.2 | Ubuntu 25.10 (questing) | 0.17+2.6-1ubuntu3.2 | 3 | Mar 16, 2026 | |
| Patch now | telnet 0.17+2.5-3ubuntu4.1 | Ubuntu 24.04.5 LTS (noble) | 0.17+2.5-3ubuntu4.1 | 1 | 1 | Jan 20, 2026 |
| Patch now | telnet 0.17+2.6-1ubuntu3.1 | Ubuntu 25.10 (questing) | 0.17+2.6-1ubuntu3.1 | 1 | 1 | Jan 20, 2026 |
| High | telnet 0.17+2.5-5ubuntu1 | Ubuntu 25.04 (plucky) | 0.17+2.5-5ubuntu1 | 1 | Jan 16, 2026 | |
| High | telnet 0.17+2.5-3ubuntu4 | Ubuntu 24.10 (oracular) | 0.17+2.5-3ubuntu4 | 1 | Jan 16, 2026 | |
| High | telnet 0.17+2.4-3ubuntu1 | Ubuntu 24.04.5 LTS (noble) | 0.17+2.4-3ubuntu1 | 1 | Aug 13, 2023 |