Unauthenticated RCE in Zoho ManageEngine ServiceDesk Plus / SupportCenter Plus
CVE-2021-44077 is a critical unauthenticated remote code execution vulnerability affecting Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014. The issue is related to /RestAPI URLs handled by a servlet and to ImportTechnicians in the Struts configuration. Reporting in the provided content states that exploitation can be performed with two unauthenticated remote requests via the ServiceDesk Plus REST API: the first uploads an executable specifically named msiexec.exe, and the second triggers execution of that uploaded payload. Observed intrusions used this access to place and run malicious binaries and deploy web shells, including a modified Godzilla-style payload implemented as an Apache Tomcat Servlet Filter.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a working exploit for CVE-2021-44077, a pre-authentication remote code execution vulnerability in ManageEngine ServiceDesk Plus versions prior to build 11306. The exploit is implemented in a single Python script ('exploit.py') that takes two arguments: the base URL of the target ServiceDesk Plus instance and the path to a Windows executable payload. The script uploads the payload to a specific REST API endpoint and then triggers its execution via another endpoint, resulting in arbitrary code execution on the target server. The README provides detailed usage instructions, including how to generate a payload (e.g., with msfvenom) and how to set up a listener for a reverse shell. The exploit requires the 'requests' Python library and is operational, allowing attackers to run arbitrary code on vulnerable systems. No detection or scanning functionality is present; the script is solely for exploitation. The repository is well-structured, with clear documentation and a single exploit script as the main code file.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in ManageEngine SupportCenter Plus used to gain privileged access.
A specific vulnerability in ManageEngine that was used by threat actors to gain access, leading to webshell deployment and data exfiltration.
Critical unauthenticated remote code execution vulnerability in Zoho ManageEngine ServiceDesk Plus (via the REST API) enabling remote upload and execution of a payload (e.g., a maliciously named msiexec.exe), leading to follow-on compromise such as webshell deployment.
The version that knows your environment.
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.