How severe is CVE-2015-4323?

CVE-2015-4323 has a CVSS 2.0 base score of 6.1, rated medium severity.

Is CVE-2015-4323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4323?

CVE-2015-4323 primarily affects Cisco Nx-os. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-4323?

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

When was CVE-2015-4323 published?

CVE-2015-4323 was published on 2015-08-19 and last updated on 2026-06-17.

CVE-2015-4323

CVE-2015-4323 is a medium-severity vulnerability in Cisco Nx-os with a CVSS 2.0 base score of 6.1. 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-119.

Key facts

Severity: Medium (CVSS 2.0 base score 6.1)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Nx-os
Published: 2015-08-19
Last modified: 2026-06-17

Description

Buffer overflow in Cisco NX-OS on Nexus 1000V devices for VMware vSphere 7.3(0)ZN(0.9); Nexus 3000 devices 6.0(2)U5(1.41), 7.0(3)I2(0.373), and 7.3(0)ZN(0.83); Nexus 4000 devices 4.1(2)E1(1b); Nexus 7000 devices 6.2(14)S1; Nexus 9000 devices 7.3(0)ZN(0.9); and MDS 9000 devices 6.2 (13) and 7.1(0)ZN(91.99) and MDS SAN-OS 7.1(0)ZN(91.99) allows remote attackers to cause a denial of service (device outage) via a crafted ARP packet, related to incorrect MTU validation, aka Bug IDs CSCuv71933, CSCuv61341, CSCuv61321, CSCuu78074, CSCut37060, CSCuv61266, CSCuv61351, CSCuv61358, and CSCuv61366.

Frequently asked questions

What is CVE-2015-4323?: Buffer overflow in Cisco NX-OS on Nexus 1000V devices for VMware vSphere 7.3(0)ZN(0.9); Nexus 3000 devices 6.0(2)U5(1.41), 7.0(3)I2(0.373), and 7.3(0)ZN(0.83); Nexus 4000 devices 4.1(2)E1(1b); Nexus 7000 devices 6.2(14)S1; Nexus 9000 devices 7.3(0)ZN(0.9); and MDS 9000 devices 6.2 (13) and 7.1(0)ZN(91.99) and MDS SAN-OS 7.1(0)ZN(91.99) allows remote attackers to cause a denial of service (device outage) via a crafted ARP packet, related to incorrect MTU validation, aka Bug IDs CSCuv71933, CSCuv61341, CSCuv61321, CSCuu78074, CSCut37060, CSCuv61266, CSCuv61351, CSCuv61358, and CSCuv61366.
How severe is CVE-2015-4323?: CVE-2015-4323 has a CVSS 2.0 base score of 6.1, rated medium severity.
Is CVE-2015-4323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4323?: CVE-2015-4323 primarily affects Cisco Nx-os. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-4323?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4323 published?: CVE-2015-4323 was published on 2015-08-19 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:cisco:nx-os:6.2\(14\)s1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.0\(2\)u5\(1.41\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.0\(3\)i2\(0.373\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(0\)zn\(0.83\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(0\)zn\(0.9\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:mds_9000_nx-os:6.2\(13\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:mds_9000_nx-os:7.1\(0\)zn\(91.99\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1\(2\)e1\(1b\):*:*:*:*:*:*:*

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