CVE-2021-3287 in the critical feed json
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization cla…
published 2021-04-22 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26622
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 51.3%
- EPSS 51.3% chance of exploitation in 30 days, percentile 98%
- public exploits
- 1
- Metasploit, plus a Nuclei check
Summary
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Patch / fix
- zohocorp manageengine_opmanager 12.5
Timeline
- Published
- First public exploit (Metasploit exploit/multi/http/opmanager_sumpdu_deserialization)
Exploit prediction
51.33% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/multi/http/opmanager_sumpdu_deserialization ManageEngine OpManager SumPDU Java Deserialization metasploit exploit, excellent rank, 2021-07-26
- Nuclei template Zoho ManageEngine OpManager < 12.5.329 - Remote Code Execution nuclei detection template
- packetstormsecurity.com http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
packetstormsecurity.com
/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html
exploit, third-party-advisory, vdb-entry
-
manageengine.com
/network-monitoring/help/read-me-complete.html#125329
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-3287
- NVD CVE-2021-3287
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