How severe is CVE-2016-5363?

CVE-2016-5363 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2016-5363 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5363?

CVE-2016-5363 primarily affects Openstack Neutron. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-5363?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-5363 published?

CVE-2016-5363 was published on 2016-06-17 and last updated on 2026-06-17.

CVE-2016-5363

CVE-2016-5363 is a high-severity vulnerability in Openstack Neutron with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-254.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v2: 6.4
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-254
Affected product: Openstack Neutron
Published: 2016-06-17
Last modified: 2026-06-17

Description

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.

Frequently asked questions

What is CVE-2016-5363?: The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.
How severe is CVE-2016-5363?: CVE-2016-5363 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2016-5363 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5363?: CVE-2016-5363 primarily affects Openstack Neutron. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-5363?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-5363 published?: CVE-2016-5363 was published on 2016-06-17 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:openstack:neutron:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:7.0.3:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:openstack:neutron:8.1.0:*:*:*:*:*:*:*

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