High severity · published Apr 4, 2026
CVE-2018-25251
Snes9K 0.0.9z Buffer Overflow SEH via Netplay Socket
8.4
CVSS
0.2%
EPSS
No
On KEV
Description
Snes9K 0.0.9z contains a buffer overflow vulnerability in the Netplay Socket Port Number field that allows local attackers to trigger a structured exception handler (SEH) overwrite. Attackers can craft a malicious payload and paste it into the Socket Port Number field via the Netplay Options menu to achieve code execution through SEH chain exploitation.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
S0
Snes9K 0.0.9z · Sourceforge
0.0.9z · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-25251
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-25251
sourceforge.net
https://sourceforge.net/projects/snes9k/
sourceforge.net
https://sourceforge.net/projects/snes9k/files/latest/download
www.exploit-db.com
https://www.exploit-db.com/exploits/45598
www.vulncheck.com
https://www.vulncheck.com/advisories/snes9k-9z-buffer-overflow-seh-via-netplay-socket