CVE-2021-28506

CVE-2021-28506 is a critical-severity vulnerability in Arista Eos with a CVSS 3.x base score of 9.1. 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-306.

Key facts

Description

An issue has recently been discovered in Arista EOS where certain gNOI APIs incorrectly skip authorization and authentication which could potentially allow a factory reset of the device.

Frequently asked questions

What is CVE-2021-28506?
An issue has recently been discovered in Arista EOS where certain gNOI APIs incorrectly skip authorization and authentication which could potentially allow a factory reset of the device.
How severe is CVE-2021-28506?
CVE-2021-28506 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-28506 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28506?
CVE-2021-28506 affects Arista Eos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28506?
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-2021-28506 published?
CVE-2021-28506 was published on 2022-01-14 and last updated on 2026-06-17.

References

Affected products (1)

More vulnerabilities in Arista Eos

All CVEs affecting Arista Eos →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →