https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2020-36400.htmlhttps://patchthecve.com/cve/CVE-2020-36400.htmlWed, 17 Jun 2026 03:15:24 +0000CRITICAL 9.8: ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.https://patchthecve.com/cve/CVE-2021-20237.htmlhttps://patchthecve.com/cve/CVE-2021-20237.htmlWed, 17 Jun 2026 03:33:31 +0000HIGH 7.5: An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denihttps://patchthecve.com/cve/CVE-2021-20236.htmlhttps://patchthecve.com/cve/CVE-2021-20236.htmlWed, 17 Jun 2026 03:33:31 +0000CRITICAL 9.8: A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as wehttps://patchthecve.com/cve/CVE-2021-20235.htmlhttps://patchthecve.com/cve/CVE-2021-20235.htmlWed, 17 Jun 2026 03:33:31 +0000HIGH 8.1: There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server cohttps://patchthecve.com/cve/CVE-2021-20234.htmlhttps://patchthecve.com/cve/CVE-2021-20234.htmlWed, 17 Jun 2026 03:33:31 +0000MEDIUM 6.5: An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.https://patchthecve.com/cve/CVE-2020-15166.htmlhttps://patchthecve.com/cve/CVE-2020-15166.htmlWed, 17 Jun 2026 02:56:10 +0000HIGH 7.5: In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able tohttps://patchthecve.com/cve/CVE-2019-13132.htmlhttps://patchthecve.com/cve/CVE-2019-13132.htmlWed, 17 Jun 2026 02:16:08 +0000CRITICAL 9.8: In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client connecting to a libzmq application, running with a socket listening with CURVE encryption/authentication enabled, may cause a stack overflow and overwrite the stack with arbitrary data, due tohttps://patchthecve.com/cve/CVE-2019-6250.htmlhttps://patchthecve.com/cve/CVE-2019-6250.htmlWed, 17 Jun 2026 02:38:53 +0000HIGH 8.8: A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.1. A v2_decoder.cpp zmq::v2_decoder_t::size_ready integer overflow allows an authenticated attacker to overwrite an arbitrary amount of bytes beyond the bounds of a buffer, which can be levehttps://patchthecve.com/cve/CVE-2014-9721.htmlhttps://patchthecve.com/cve/CVE-2014-9721.htmlWed, 17 Jun 2026 00:18:52 +0000MEDIUM 4.3: libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header.https://patchthecve.com/cve/CVE-2014-7203.htmlhttps://patchthecve.com/cve/CVE-2014-7203.htmlWed, 17 Jun 2026 00:14:33 +0000MEDIUM 4.3: libzmq (aka ZeroMQ/C++) 4.0.x before 4.0.5 does not ensure that nonces are unique, which allows man-in-the-middle attackers to conduct replay attacks via unspecified vectors.https://patchthecve.com/cve/CVE-2014-7202.htmlhttps://patchthecve.com/cve/CVE-2014-7202.htmlWed, 17 Jun 2026 00:14:33 +0000MEDIUM 4.3: stream_engine.cpp in libzmq (aka ZeroMQ/C++)) 4.0.5 before 4.0.5 allows man-in-the-middle attackers to conduct downgrade attacks via a crafted connection request.