High severity · published May 23, 2026
CVE-2018-25356
SIPp 3.6 Local Buffer Overflow via Command-line Arguments
8.4
CVSS
0.2%
EPSS
No
On KEV
Description
SIPp 3.6 and earlier contains a local buffer overflow vulnerability in command-line argument handling that allows local attackers to crash the application or execute arbitrary code. Attackers can trigger the vulnerability by supplying oversized input to the -3pcc, -i, or -log_file parameters, causing strcpy to write beyond buffer boundaries in sipp.cpp.
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 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
SIPp · Sipp
through 3.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-25356
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-25356
sipp.sourceforge.net
http://sipp.sourceforge.net/
github.com
https://github.com/SIPp/sipp/releases
www.exploit-db.com
https://www.exploit-db.com/exploits/44962
www.vulncheck.com
https://www.vulncheck.com/advisories/sipp-local-buffer-overflow-via-command-line-arguments
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