What is CVE-2021-28510?

CVE-2021-28510 is a medium-severity vulnerability in Arista 7020r, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2023-01-26.

How severe is CVE-2021-28510?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Arista 7020r

CVE-2021-28510

For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.

Vulnerability class: DoS (Denial of Service)

Published 2023-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

References

www.arista.com/en/support/advisories-notices/security-advisory/15439-security-a… (Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2021-28510?: CVE-2021-28510 is a medium-severity vulnerability in Arista 7020r, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2023-01-26.
How severe is CVE-2021-28510?: Medium severity. CVSS v3 base score is 5.3 out of 10.