How severe is CVE-2020-3386?

CVE-2020-3386 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3386 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3386?

CVE-2020-3386 affects Cisco Data Center Network Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3386?

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-2020-3386 published?

CVE-2020-3386 was published on 2020-07-31 and last updated on 2026-06-17.

CVE-2020-3386

CVE-2020-3386 is a high-severity vulnerability in Cisco Data Center Network Manager with a CVSS 3.x base score of 8.8. 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 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Cisco Data Center Network Manager
Published: 2020-07-31
Last modified: 2026-06-17

Description

A vulnerability in the REST API endpoint of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker with a low-privileged account to bypass authorization on the API of an affected device. The vulnerability is due to insufficient authorization of certain API functions. An attacker could exploit this vulnerability by sending a crafted request to the API using low-privileged credentials. A successful exploit could allow the attacker to perform arbitrary actions through the REST API with administrative privileges.

Frequently asked questions

What is CVE-2020-3386?: A vulnerability in the REST API endpoint of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker with a low-privileged account to bypass authorization on the API of an affected device. The vulnerability is due to insufficient authorization of certain API functions. An attacker could exploit this vulnerability by sending a crafted request to the API using low-privileged credentials. A successful exploit could allow the attacker to perform arbitrary actions through the REST API with administrative privileges.
How severe is CVE-2020-3386?: CVE-2020-3386 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3386 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3386?: CVE-2020-3386 affects Cisco Data Center Network Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3386?: 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-2020-3386 published?: CVE-2020-3386 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-improper-auth-7Krd9TDT

Affected products (1)

cpe:2.3:a:cisco:data_center_network_manager:*:*:*:*:*:*:*:*

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