How severe is CVE-2018-0337?

CVE-2018-0337 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-0337 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0337?

CVE-2018-0337 primarily affects Cisco Nx-os. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-0337?

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-2018-0337 published?

CVE-2018-0337 was published on 2018-06-21 and last updated on 2026-06-17.

CVE-2018-0337

CVE-2018-0337 is a high-severity vulnerability in Cisco Nx-os with a CVSS 3.x base score of 7.8. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Cisco Nx-os
Published: 2018-06-21
Last modified: 2026-06-17

Description

A vulnerability in the role-based access-checking mechanisms of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on an affected device. The vulnerability exists because the affected software lacks proper input and validation checks for certain file systems. An attacker could exploit this vulnerability by issuing crafted commands in the CLI of an affected device. A successful exploit could allow the attacker to cause other users to execute unwanted, arbitrary commands on the affected device. Cisco Bug IDs: CSCvd06339, CSCvd15698, CSCvd36108, CSCvf52921, CSCvf52930, CSCvf52953, CSCvf52976.

Frequently asked questions

What is CVE-2018-0337?: A vulnerability in the role-based access-checking mechanisms of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on an affected device. The vulnerability exists because the affected software lacks proper input and validation checks for certain file systems. An attacker could exploit this vulnerability by issuing crafted commands in the CLI of an affected device. A successful exploit could allow the attacker to cause other users to execute unwanted, arbitrary commands on the affected device. Cisco Bug IDs: CSCvd06339, CSCvd15698, CSCvd36108, CSCvf52921, CSCvf52930, CSCvf52953, CSCvf52976.
How severe is CVE-2018-0337?: CVE-2018-0337 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-0337 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0337?: CVE-2018-0337 primarily affects Cisco Nx-os. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-0337?: 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-2018-0337 published?: CVE-2018-0337 was published on 2018-06-21 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-rbaccess

Affected products (12)

cpe:2.3:o:cisco:nx-os:7.0\(8\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.1\(4\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(1\)n1\(0.6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.350\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(1\)dx\(0.119\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:7.3\(3\)d1\(0.2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.0\(0.54\)s0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.1\(0\)bd\(0.20\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.1\(0.9\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.2\(0.4\)s0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.3\(0\)spg\(0.30\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:8.8\(3.5\)s0:*:*:*:*:*:*:*

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