CVE-2021-28510
CVSS v3
7.5
HIGH
EPSS Score
1.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2023-01-26
Frequently asked questions
What is 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.
Is CVE-2021-28510 actively exploited?
Active exploitation of CVE-2021-28510 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-28510?
CVE-2021-28510 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-28510 affecting your environment?
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