Critical severity · published Oct 21, 2025
CVE-2025-11624
Buffer overwrite when processing file handles with the SFTP server
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
Potential stack buffer overwrite on the SFTP server side when receiving a malicious packet that has a handle size larger than the system handle or file descriptor size, but smaller than max handle size allowed.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
wolfSSH · wolfSSH
1.3.0 through 1.4.20 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11624
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11624
Issue Tracking
https://github.com/wolfSSL/wolfssh/pull/834
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