How severe is CVE-2016-1453?

CVE-2016-1453 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-1453 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1453?

CVE-2016-1453 primarily affects Cisco Nx-os. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1453?

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

When was CVE-2016-1453 published?

CVE-2016-1453 was published on 2016-10-06 and last updated on 2026-06-17.

CVE-2016-1453

CVE-2016-1453 is a critical-severity vulnerability in Cisco Nx-os with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Nx-os
Published: 2016-10-06
Last modified: 2026-06-17

Description

Buffer overflow in the Overlay Transport Virtualization (OTV) GRE feature in Cisco NX-OS 5.0 through 7.3 on Nexus 7000 and 7700 devices allows remote attackers to execute arbitrary code via long parameters in a packet header, aka Bug ID CSCuy95701.

Frequently asked questions

What is CVE-2016-1453?: Buffer overflow in the Overlay Transport Virtualization (OTV) GRE feature in Cisco NX-OS 5.0 through 7.3 on Nexus 7000 and 7700 devices allows remote attackers to execute arbitrary code via long parameters in a packet header, aka Bug ID CSCuy95701.
How severe is CVE-2016-1453?: CVE-2016-1453 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-1453 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1453?: CVE-2016-1453 primarily affects Cisco Nx-os. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1453?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-1453 published?: CVE-2016-1453 was published on 2016-10-06 and last updated on 2026-06-17.

References

Affected products (46)

cpe:2.3:o:cisco:nx-os:4.1.\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1.\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1.\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1.\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(8\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2.\(2a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.0\(2a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.0\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.0\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.1\(6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(3a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(7\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:5.2\(9\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.0\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.0\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.0\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.0\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(4a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.1\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(2a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(6b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(8\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:6.2\(8a\):*:*:*:*:*:*:*

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