CVE-2021-28682
CVSS v3
7.5
HIGH
EPSS Score
2.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations.
Technical details
- Published
- 2021-05-20
Frequently asked questions
What is CVE-2021-28682?
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations.
Is CVE-2021-28682 actively exploited?
Active exploitation of CVE-2021-28682 has not been confirmed. Its EPSS score was 2.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-28682?
CVE-2021-28682 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-28682 affecting your environment?
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