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CVE-2021-3287 is an unauthenticated remote code execution vulnerability in ManageEngine OpManager caused by a general bypass in a deserialization class. OpManager builds 125219 and below are identified as affected. Successful exploitation enables remote execution of arbitrary code on the affected system.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module targeting a Java deserialization vulnerability in ManageEngine OpManager (CVE-2020-28653 and CVE-2021-3287). The exploit leverages unauthenticated HTTP POST requests to specific endpoints ('/servlets/com.adventnet.tools.sum.transport.SUMHandShakeServlet' and '/servlets/com.adventnet.tools.sum.transport.SUMCommunicationServlet') to deliver malicious Java serialized objects, resulting in remote code execution as SYSTEM/root. The module supports multiple payload types and platforms (Windows, Linux, Unix, Python), and can deliver staged payloads such as Meterpreter or reverse shells. The exploit is weaponized, requiring only the target's network accessibility and no authentication. The code is structured as a standard Metasploit module, with clear separation of target platforms, payload delivery, and vulnerability checks.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.