How severe is CVE-2021-36306?

CVE-2021-36306 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-36306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36306?

CVE-2021-36306 affects Dell Networking Os10. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36306?

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-2021-36306 published?

CVE-2021-36306 was published on 2021-11-20 and last updated on 2026-06-17.

CVE-2021-36306

CVE-2021-36306 is a high-severity vulnerability in Dell Networking Os10 with a CVSS 3.x base score of 8.1. 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-287.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 9.3
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Dell Networking Os10
Published: 2021-11-20
Last modified: 2026-06-17

Description

Networking OS10, versions prior to October 2021 with RESTCONF API enabled, contains an authentication bypass vulnerability. A remote unauthenticated attacker could exploit this vulnerability to gain access and perform actions on the affected system.

Frequently asked questions

What is CVE-2021-36306?: Networking OS10, versions prior to October 2021 with RESTCONF API enabled, contains an authentication bypass vulnerability. A remote unauthenticated attacker could exploit this vulnerability to gain access and perform actions on the affected system.
How severe is CVE-2021-36306?: CVE-2021-36306 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36306?: CVE-2021-36306 affects Dell Networking Os10. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36306?: 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-2021-36306 published?: CVE-2021-36306 was published on 2021-11-20 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000193076

Affected products (1)

cpe:2.3:o:dell:networking_os10:*:*:*:*:*:*:*:*

More vulnerabilities in Dell Networking Os10

CVE-2024-25949 — High (CVSS 8.8): Dell OS10 Networking Switches, versions10.5.6.x, 10.5.5.x, 10.5.4.x and 10.5.3.x ,contain an improper authorization…
CVE-2021-36307 — High (CVSS 8.8): Networking OS10, versions prior to October 2021 with RESTCONF API enabled, contains a privilege escalation…
CVE-2018-15778 — High (CVSS 8.8): Dell OS10 versions prior to 10.4.2.1 contain a vulnerability caused by lack of proper input validation on the…
CVE-2023-39248 — High (CVSS 7.5): Dell OS10 Networking Switches running 10.5.2.x and above contain an Uncontrolled Resource Consumption (Denial of…
CVE-2018-15784 — High (CVSS 7.4): Dell Networking OS10 versions prior to 10.4.3.0 contain a vulnerability in the Phone Home feature which does not…
CVE-2021-36308 — Medium (CVSS 5.9): Networking OS10, versions prior to October 2021 with Smart Fabric Services enabled, contains an authentication bypass…

All CVEs affecting Dell Networking Os10 →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →