Stack-based buffer overflow in Tcpreplay - #VU139400
Published: July 27, 2026
Vulnerability identifier: #VU139400
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to stack-based buffer overflow in the tcpprep services file parser in parse_services() when parsing an attacker-supplied services file passed through the --services option. A remote attacker can trick the victim into opening a crafted file to execute arbitrary code.
User interaction is required to run tcpprep with the attacker-supplied services file.
Affected software
Tcpreplay
Remediation
Install security update from vendor's website.
Tcpreplay - update to 4.6.0 beta3