Critical severity · published Mar 25, 2024
CVE-2024-2873
User authentication bypass in wolfSSH server
9.1
CVSS
0.6%
EPSS
No
On KEV
Description
A vulnerability was found in wolfSSH's server-side state machine before versions 1.4.17. A malicious client could create channels without first performing user authentication, resulting in unauthorized access.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
wolfSSH · wolfSSL Inc.
through v1.4.16 · source: vendor, NVD, CISA
Affected product
WO
wolfSSH
wolfSSL Inc.
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9.1
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wolfSSH SSH client accepts unsolicited forwarded-tcpip channel opens without an authorization check
8.8
CVE-2026-83742
wstrncat() unsigned integer underflow leads to an off-by-one null write in wolfSSH on non-Windows platforms
7.4
CVE-2026-16516
wolfSSH ECDSA host key curve not validated against negotiated algorithm
5.3
CVE-2026-84897
wolfSSH server accepts server-to-client DH group exchange messages from an unauthenticated client, causing pre-authentication primality-test CPU exhaustion and key exchange role confusion