CVE-2026-13589

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.

• CWE-119
• CWE-122

• https://github.com/seladb/PcapPlusPlus/
• https://github.com/seladb/PcapPlusPlus/commit/98e671010bc7c87b95898c22ae289220ae92542b
• https://github.com/seladb/PcapPlusPlus/issues/2152
• https://github.com/seladb/PcapPlusPlus/pull/2161
• https://github.com/user-attachments/files/28214571/poc.zip
• https://vuldb.com/cve/CVE-2026-13589
• https://vuldb.com/submit/844482
• https://vuldb.com/vuln/374592
• https://vuldb.com/vuln/374592/cti

Published

Jun 29, 2026

Last Modified

Jun 29, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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