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9.8
CRITICAL CVSS 3.1
CVE-2026-32746
GNU inetutils telnetd LINEMODE SLC Buffer Overflow
Overview
Description

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.

Details
INFO

Published Date :

March 13, 2026, 7:55 p.m.

Last Modified :

March 23, 2026, 2:16 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-32746 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Gnu inetutils
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL MITRE-CVE
CVSS 3.1 CRITICAL [email protected]
Solution
Update GNU inetutils to a version that addresses the out-of-bounds write vulnerability in telnetd.
  • Update GNU inetutils to the latest version.
  • Apply vendor-provided patches for telnetd.
  • Disable the LINEMODE option if possible.
  • Remove or disable telnetd if not needed.
Public PoC/Exploit Available at Github

CVE-2026-32746 has a 11 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-32746.

URL Resource
https://lists.gnu.org/archive/html/bug-inetutils/2026-03/msg00031.html
https://www.openwall.com/lists/oss-security/2026/03/12/4
http://www.openwall.com/lists/oss-security/2026/03/14/1
https://github.com/watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-32746 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-32746 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
ekomsSavior/telnet_scan

scanner/exploiter CVE-2026-24061 & CVE-2026-32746

Python

Updated: 1 week, 2 days ago
1 stars 2 fork 2 watcher
Born at : March 26, 2026, 12:52 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
chosenonehacks/CVE-2026-32746

None

Dockerfile Python

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 20, 2026, 10:23 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
danindiana/cve-2026-32746-mitigation

None

Jupyter Notebook Python

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : March 20, 2026, 3:08 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
narayan-ghorpade/cve-security-analyzer

None

HTML

Updated: 2 weeks, 2 days ago
1 stars 0 fork 0 watcher
Born at : March 19, 2026, 8:12 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746

None

Python

Updated: 1 week, 6 days ago
5 stars 0 fork 0 watcher
Born at : March 19, 2026, 2:58 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
jeffaf/autohack

Autonomous security research framework - AI agents iterate exploits overnight (inspired by Karpathy's autoresearch)

Python Dockerfile

Updated: 2 weeks, 1 day ago
0 stars 2 fork 2 watcher
Born at : March 18, 2026, 12:52 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
jeffaf/cve-2026-32746

CVE-2026-32746 - GNU InetUtils telnetd LINEMODE SLC Buffer Overflow PoC (pre-auth RCE, CVSS 9.8)

Dockerfile Python

Updated: 2 weeks ago
17 stars 9 fork 9 watcher
Born at : March 18, 2026, 12:37 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
0xMarcio/cve

Latest CVEs with their Proof of Concept exploits.

Python HTML

Updated: 5 days, 19 hours ago
1188 stars 142 fork 142 watcher
Born at : May 24, 2024, 11:02 a.m. This repo has been linked 83 different CVEs too.
Profile Photo
damho1104/damho1104

None

Python

Updated: 2 weeks, 2 days ago
2 stars 0 fork 0 watcher
Born at : March 27, 2022, 2:32 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
GhostTroops/TOP

TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things

bugbounty cve exp exploit payload poc rce vulnerability

Shell

Updated: 2 weeks, 1 day ago
720 stars 124 fork 124 watcher
Born at : March 19, 2022, 1:54 a.m. This repo has been linked 286 different CVEs too.
Profile Photo
nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 2 weeks ago
7589 stars 1242 fork 1242 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 778 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-32746 vulnerability anywhere in the article.

  • CybersecurityNews
Synology DiskStation Manager Vulnerability Allow Remote Attackers to Execute Arbitrary Commands

A critical security advisory has been issued for a severe vulnerability in DiskStation Manager (DSM) that allows unauthenticated remote attackers to execute arbitrary commands. Given the widespread us ... Read more

Published Date: Mar 26, 2026 (1 week, 3 days ago)
  • Daily CyberSecurity
NAS Under Siege: Critical 9.8 CVSS Bug in Synology Telnet Opens the Door to Total Hijack

Synology has issued an urgent security update for its DiskStation Manager (DSM) operating system to address a critical vulnerability in the Telnet service. The flaw, tracked as CVE-2026-32746, could a ... Read more

Published Date: Mar 26, 2026 (1 week, 3 days ago)
  • The Hacker News
⚡ Weekly Recap: CI/CD Backdoor, FBI Buys Location Data, WhatsApp Ditches Numbers & More

Another week, another reminder that the internet is still a mess. Systems people thought were secure are being broken in simple ways, showing many still ignore basic advisories. This edition covers a ... Read more

Published Date: Mar 23, 2026 (1 week, 6 days ago)
  • security.nl
32 jaar oud Telnet-lek kan aanvaller volledige controle over servers geven

Onderzoekers hebben een 32 jaar oude kwetsbaarheid in Telnet ontdekt waardoor aanvallers in het ergste geval volledige controle over de server kunnen krijgen. Een beveiligingsupdate is nog niet beschi ... Read more

Published Date: Mar 20, 2026 (2 weeks, 2 days ago)
  • CybersecurityNews
Critical Telnetd Vulnerability Enables Remote Attacker to Execute Arbitrary Code via Port 23

A critical buffer overflow vulnerability in the GNU Inetutils telnetd daemon. Tracked as CVE-2026-32746, this flaw allows an unauthenticated remote attacker to execute arbitrary code and gain root acc ... Read more

Published Date: Mar 18, 2026 (2 weeks, 4 days ago)
  • The Hacker News
Critical Unpatched Telnetd Flaw (CVE-2026-32746) Enables Unauthenticated Root RCE via Port 23

Cybersecurity researchers have disclosed a critical security flaw impacting the GNU InetUtils telnet daemon (telnetd) that could be exploited by an unauthenticated remote attacker to execute arbitrary ... Read more

Published Date: Mar 18, 2026 (2 weeks, 4 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-32746 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 23, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 19, 2026

    Action Type Old Value New Value
    Removed Reference https://github.com/jeffaf/cve-2026-32746
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 18, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/jeffaf/cve-2026-32746
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Mar. 16, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/03/14/1
  • New CVE Received by [email protected]

    Mar. 13, 2026

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-120
    Added Reference https://lists.gnu.org/archive/html/bug-inetutils/2026-03/msg00031.html
    Added Reference https://www.openwall.com/lists/oss-security/2026/03/12/4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact