CVE-2021-42099
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
- Record
CVE-2021-42099- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-434
- Updated
- 2026-11-02
CVE List No score
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
- Record
CVE-2021-42099- Updated
- 2026-11-02
EUVDEUVD-2021-29085 No score
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
- Record
EUVD-2021-29085- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pf6c-6jfw-4cwc No score
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
- Record
GHSA-pf6c-6jfw-4cwc- Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42099 is a critical vulnerability (CVSS 9.8) in Zohocorp Manageengine M365 Manager Plus, published November 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 6.76%, the 94th percentile. No source names a fixed version.