CVE-2021-42076
CVSS v3
7.5
HIGH
EPSS Score
1.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in Barrier before 2.3.4. An attacker can cause memory exhaustion in the barriers component (aka the server-side implementation of Barrier) and barrierc by sending long TCP messages.
Technical details
- Published
- 2021-11-08
Frequently asked questions
What is CVE-2021-42076?
An issue was discovered in Barrier before 2.3.4. An attacker can cause memory exhaustion in the barriers component (aka the server-side implementation of Barrier) and barrierc by sending long TCP messages.
Is CVE-2021-42076 actively exploited?
Active exploitation of CVE-2021-42076 has not been confirmed. Its EPSS score was 1.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-42076?
CVE-2021-42076 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-42076 affecting your environment?
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