CVE-2020-36400

CRITICAL 9.8CVE-2020-36400 · Published 01/07/2021 · updated 17/06/2026

In short

CVE-2020-36400 is a CRITICAL (CVSS 9.8) vulnerability affecting libzmq (zeromq).
Chance of exploitation in the next 30 days (EPSS): 1.8%, higher than 79.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
libzmq zeromq	`= 4.3.3`	No fix yet

ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.

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Package

Affected versions

Patched versions

= 4.3.3

No fix yet

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