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Fencer Vulns
critical 9.8

CVE-2026-32746 in the critical feed json

telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption handler because add…

published 2026-03-13 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-12065

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
45.3%
EPSS 45.3% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption handler because add_slc does not check whether the buffer is full.

Patch / fix

  • inetutils Debian 12 2:2.4-2+deb12u3
  • inetutils Debian 13 2:2.6-3+deb13u3
  • inetutils Debian 14 2:2.7-4

debian advisories DEBIAN-CVE-2026-32746

  • inetutils Ubuntu 24.04 LTS 2:2.5-3ubuntu4.2
  • inetutils Ubuntu 25.10 2:2.6-1ubuntu3.2
  • inetutils Ubuntu 26.04 LTS 2:2.7-2ubuntu1.1
  • inetutils Ubuntu Pro 14.04 LTS 2:1.9.2-1ubuntu0.1~esm4
  • inetutils Ubuntu Pro 16.04 LTS 2:1.9.4-1ubuntu0.1~esm6
  • inetutils Ubuntu Pro 18.04 LTS 2:1.9.4-3ubuntu0.1+esm5
  • inetutils Ubuntu Pro 20.04 LTS 2:1.9.4-11ubuntu0.2+esm4
  • inetutils Ubuntu Pro 22.04 LTS 2:2.2-2ubuntu0.2+esm1

ubuntu advisories UBUNTU-CVE-2026-32746

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • krb5-appl SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.0.3-3.12.1

suse advisories SUSE-SU-2026:0930-1

  • krb5-appl openSUSE Tumbleweed 1.0.3-6.1
  • krb5-appl openSUSE Leap 16.0 1.0.3-bp160.2.1

opensuse advisories openSUSE-SU-2026:10657-1openSUSE-SU-2026:20374-1

  • inetutils-telnet Alpine 3.24 2.8-r0

alpine advisories ALPINE-CVE-2026-32746

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Timeline

  1. Published
  2. First public exploit (EDB-52556)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
7 mo ago

Exploit prediction

45.30% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52556 telnetd 2.7 - Buffer Overflow remote, 2026-05-07
  • github.com https://github.com/watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746 referenced PoC, tagged "exploit" by a source, unverified
  • lists.gnu.org https://lists.gnu.org/archive/html/bug-inetutils/2026-03/msg00031.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • GNU inetutils

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.