CVE-2020-11877
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
airhost.exe in Zoom Client for Meetings 4.6.11 uses 3423423432325249 as the Initialization Vector (IV) for AES-256 CBC encryption. NOTE: the vendor states that this IV is used only within unreachable code
Technical details
- Published
- 2020-04-17
Frequently asked questions
What is CVE-2020-11877?
airhost.exe in Zoom Client for Meetings 4.6.11 uses 3423423432325249 as the Initialization Vector (IV) for AES-256 CBC encryption. NOTE: the vendor states that this IV is used only within unreachable code
Is CVE-2020-11877 actively exploited?
Active exploitation of CVE-2020-11877 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-2020-11877?
CVE-2020-11877 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2020-11877 affecting your environment?
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