What’s Vulnerable › Vulnerabilities

CVE-2026-13589: seladb PcapPlusPlus Telnet Subnegotiation Packet TelnetLayer.cpp getSubCommand heap-based overflow

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-29 · updated 2026-10-25
• Weakness: CWE-119

Description

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.

Affected products

• seladb PcapPlusPlus: 25.05

References

• 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

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