How severe is CVE-2020-3376?

CVE-2020-3376 has a CVSS 3.x base score of 7.3, 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 low, and availability low.

Is CVE-2020-3376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3376?

CVE-2020-3376 primarily affects Cisco Data Center Network Manager. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3376?

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-2020-3376 published?

CVE-2020-3376 was published on 2020-07-31 and last updated on 2026-06-17.

CVE-2020-3376

CVE-2020-3376 is a high-severity vulnerability in Cisco Data Center Network Manager with a CVSS 3.x base score of 7.3. 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-306.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Cisco Data Center Network Manager
Published: 2020-07-31
Last modified: 2026-06-17

Description

A vulnerability in the Device Manager application of Cisco Data Center Network Manager (DCNM) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions on an affected device. The vulnerability is due to a failure in the software to perform proper authentication. An attacker could exploit this vulnerability by browsing to one of the hosted URLs in Cisco DCNM. A successful exploit could allow the attacker to interact with and use certain functions within the Cisco DCNM.

Frequently asked questions

What is CVE-2020-3376?: A vulnerability in the Device Manager application of Cisco Data Center Network Manager (DCNM) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions on an affected device. The vulnerability is due to a failure in the software to perform proper authentication. An attacker could exploit this vulnerability by browsing to one of the hosted URLs in Cisco DCNM. A successful exploit could allow the attacker to interact with and use certain functions within the Cisco DCNM.
How severe is CVE-2020-3376?: CVE-2020-3376 has a CVSS 3.x base score of 7.3, 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 low, and availability low.
Is CVE-2020-3376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3376?: CVE-2020-3376 primarily affects Cisco Data Center Network Manager. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3376?: 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-2020-3376 published?: CVE-2020-3376 was published on 2020-07-31 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dcnm-auth-bypass-JkubGpu3

Affected products (4)

cpe:2.3:a:cisco:data_center_network_manager:11.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:data_center_network_manager:11.1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:data_center_network_manager:11.2\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:data_center_network_manager:11.3\(1\):*:*:*:*:*:*:*

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