CVE-2026-13589
MediumCVSS 5.6Summary
A heap-based buffer overflow vulnerability exists in PcapPlusPlus 25.05 in the pcpp::TelnetLayer::getSubCommand function of TelnetLayer.cpp. The attack can be initiated remotely but is difficult to exploit. A public exploit is available.
Risk Assessment
Successful exploitation could lead to remote code execution or application crash, posing a risk to systems handling Telnet traffic.
Recommendation
Apply the patch identified by 98e671010bc7c87b95898c22ae289220ae92542b immediately and update PcapPlusPlus to a version after 25.05.
Other vulnerabilities in PcapPlusPlus
See all- CVE-2026-13588Medium
A heap-based buffer overflow vulnerability was found in PcapPlusPlus 25.05 in the function pcpp::SSLClientHelloMessage::getHandshakeVersion of SSLHandshake.cpp. An attacker can remotely manipulate the handshakeVersion argument, causing a buffer overflow. The attack complexity is high and exploitation is considered difficult, but the exploit has been publicly disclosed.
- CVE-2026-13587Low
In PcapPlusPlus 25.05, the function parse_by_block_type in light_pcapng.c is vulnerable to a heap-based buffer overflow. An attacker can remotely exploit this by manipulating the captured_packet_length argument, though the attack complexity is high and exploitation is difficult.
- CVE-2026-13590Medium
A security flaw in PcapPlusPlus 25.05 affects the pcpp::ModbusLayer::getLength function in ModbusLayer.h. Manipulating the length argument causes a heap-based buffer overflow, which can be exploited remotely.
Original NVD description (English source)
A vulnerability was identified in seladb PcapPlusPlus 25.05. This affects the function pcpp::TelnetLayer::getSubCommand of the file Packet++/src/TelnetLayer.cpp of the component Telnet Subnegotiation Packet Handler. The manipulation leads to heap-based buffer overflow. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is reported as difficult. The exploit is publicly available and might be used. The identifier of the patch is 98e671010bc7c87b95898c22ae289220ae92542b. It is recommended to apply a patch to fix this issue.