CVE-2026-83540 wolfSSH - Broken Access Control

wolfSSH Windows port 1.4.15 through 1.5.0 contains a broken access control caused by improper release of Windows logon tokens between connections, letting less privileged users escalate privileges by login poisoning, exploit requires valid user account.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Update to a version later than 1.5.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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