Home/CVE/telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption
CVE

CVE-2026-32746

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

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.

CRITICAL · CVSS 9.8 EPSS 0.053
Act now
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

1
gnu inetutils<= 2.7
⚠

Public Exploits & PoCs

2
remotetelnetd 2.7 - Buffer Overflow2026-05-07
poclists.gnu.org · msg00031.htmllists.gnu.org
◈

Detection Rules (IDS/IPS)

1
et-openET EXPLOIT Telnet SLC Option Data Buffer Overflow Attempt (CVE-2026-32746)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Mar 2026 · 07:55 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2026:10657-1
suse-csafSUSE-SU-2026:0930-1
suse-csafopenSUSE-SU-2026:20374-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.openwall.com/lists/oss-security/2026/03/12/4Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/03/14/1Mailing ListThird Party Advisory
https://github.com/watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746Third Party Advisory
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