CVE-2021-3287
CVSS v3
9.8
CRITICAL
EPSS Score
51.3 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Technical details
- Published
- 2021-04-22
Frequently asked questions
What is CVE-2021-3287?
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Is CVE-2021-3287 actively exploited?
Active exploitation of CVE-2021-3287 has not been confirmed. Its EPSS score was 51.3% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3287?
CVE-2021-3287 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-3287 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 50 free checks/month · Free API key
Other 2021 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).