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Vulnerability record

CVE-2026-129116

highCVSS 4.0 7.7Published · OpenKermit

The short answer

CVE-2026-129116 affects OpenKermit C-Kermit and is rated high (CVSS 7.7). It is not in CISA's Known Exploited Vulnerabilities catalog.

What it is

C-Kermit from 7.0.197 before 11.1.515 contains an authentication bypass vulnerability in the IKSD SSL build that leaves Telnet authentication state at AUTH_VALID after a refused certificate login. Attackers holding a trusted certificate mapped to a refused account can log in as any other account with any password, gaining that account's shell access.

Weakness: CWE-287.

Severity

7.7 high

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploited (CISA KEV)

Not listed

CISA lists confirmed exploitation only

EPSS, next 30 days

No score

FIRST scores CVEs within a day of publication

How it can be exploited

Attack vector
Network
Attack complexity
Low
Attack requirements
Present
Privileges required
Low
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Affected products

C-Kermit. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-129116 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-14.

How do I fix CVE-2026-129116?

Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Deferred. The description is NVD's text, quoted as published.

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