How severe is CVE-2014-7203?

CVE-2014-7203 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2014-7203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-7203?

CVE-2014-7203 primarily affects Zeromq. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-7203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-7203 published?

CVE-2014-7203 was published on 2014-10-08 and last updated on 2026-06-17.

CVE-2014-7203

CVE-2014-7203 is a medium-severity vulnerability in Zeromq with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zeromq
Published: 2014-10-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2014-7203?: 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.
How severe is CVE-2014-7203?: CVE-2014-7203 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2014-7203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-7203?: CVE-2014-7203 primarily affects Zeromq. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-7203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-7203 published?: CVE-2014-7203 was published on 2014-10-08 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:zeromq:zeromq:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:zeromq:zeromq:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:zeromq:zeromq:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:zeromq:zeromq:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:zeromq:zeromq:4.0.4:*:*:*:*:*:*:*

More vulnerabilities in Zeromq

CVE-2021-20236 — Critical (CVSS 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…
CVE-2014-9721 — Medium (CVSS 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…
CVE-2014-7202 — Medium (CVSS 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…

All CVEs affecting Zeromq →