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TI-2026-22648 Aliases CVE-2026-28372GHSA-j682-47rx-fxrp

telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by…

Priority HIGH 69CWE-829Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-829.

Summary

telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by abusing systemd service credentials support added to the login(1) implementation of util-linux in release 2.40. This is related to client control over the CREDENTIALS_DIRECTORY environment variable, and requires an unprivileged local user to create a login.noauth file.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GNUinetutilsup to 2.7—No fix listedCNA
  • inetutils VendorGNU Affected up to 2.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:*up to 2.7VulnerableGNU
  • cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:* Versions up to 2.7 Vulnerable ·GNU

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28372
  2. 2026-10-03 Alias added: GHSA-j682-47rx-fxrp

References

Exploit 1

Patch 1

Advisory 3

  • TI-2026-19388 telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root"… KEVCVSS 3.1CRITICAL 9.8
  • TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
  • TI-2026-25237 Buffer overflow in GNU inetutils CVSS 3.1CRITICAL 9.8
  • TI-2026-25261 telnet in GNU inetutils through 2.7 allows servers to read arbitrary environment… CVSS 3.1MEDIUM 4.7
  • TI-2022-18420 telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works… CVSS 3.1HIGH 7.5
  • TI-2023-21144 GNU inetutils before 2.5 may allow privilege escalation because of unchecked return… CVSS 3.1HIGH 7.8
See all 7 →

Sources

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