CVE-2021-42099
CRITICALCVSS 9.8/10EPSS 6.55%
Last modified
CVE-2021-42099 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.. EPSS estimates a 6.55% chance of exploitation in the next 30 days.
Description
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zohocorp | Manageengine M365 Manager Plus | All versions |
| Zohocorp | Manageengine M365 Manager Plus | build_4000 |
| Zohocorp | Manageengine M365 Manager Plus | build_4001 |
| Zohocorp | Manageengine M365 Manager Plus | build_4002 |
| Zohocorp | Manageengine M365 Manager Plus | build_4003 |
| Zohocorp | Manageengine M365 Manager Plus | build_4004 |
| Zohocorp | Manageengine M365 Manager Plus | build_4005 |
| Zohocorp | Manageengine M365 Manager Plus | build_4007 |
| Zohocorp | Manageengine M365 Manager Plus | build_4008 |
| Zohocorp | Manageengine M365 Manager Plus | build_4009 |
| Zohocorp | Manageengine M365 Manager Plus | build_4010 |
| Zohocorp | Manageengine M365 Manager Plus | build_4011 |
| Zohocorp | Manageengine M365 Manager Plus | build_4012 |
| Zohocorp | Manageengine M365 Manager Plus | build_4013 |
| Zohocorp | Manageengine M365 Manager Plus | build_4014 |
| Zohocorp | Manageengine M365 Manager Plus | build_4100 |
| Zohocorp | Manageengine M365 Manager Plus | build_4101 |
| Zohocorp | Manageengine M365 Manager Plus | build_4102 |
| Zohocorp | Manageengine M365 Manager Plus | build_4103 |
| Zohocorp | Manageengine M365 Manager Plus | build_4104 |
| Zohocorp | Manageengine M365 Manager Plus | build_4105 |
| Zohocorp | Manageengine M365 Manager Plus | build_4106 |
| Zohocorp | Manageengine M365 Manager Plus | build_4108 |
| Zohocorp | Manageengine M365 Manager Plus | build_4109 |
| Zohocorp | Manageengine M365 Manager Plus | build_4110 |
| Zohocorp | Manageengine M365 Manager Plus | build_4111 |
| Zohocorp | Manageengine M365 Manager Plus | build_4112 |
| Zohocorp | Manageengine M365 Manager Plus | build_4113 |
| Zohocorp | Manageengine M365 Manager Plus | build_4115 |
| Zohocorp | Manageengine M365 Manager Plus | build_4116 |
| Zohocorp | Manageengine M365 Manager Plus | build_4117 |
| Zohocorp | Manageengine M365 Manager Plus | build_4118 |
| Zohocorp | Manageengine M365 Manager Plus | build_4119 |
| Zohocorp | Manageengine M365 Manager Plus | build_4200 |
| Zohocorp | Manageengine M365 Manager Plus | build_4201 |
| Zohocorp | Manageengine M365 Manager Plus | build_4202 |
| Zohocorp | Manageengine M365 Manager Plus | build_4203 |
| Zohocorp | Manageengine M365 Manager Plus | build_4204 |
| Zohocorp | Manageengine M365 Manager Plus | build_4205 |
| Zohocorp | Manageengine M365 Manager Plus | build_4206 |
| Zohocorp | Manageengine M365 Manager Plus | build_4207 |
| Zohocorp | Manageengine M365 Manager Plus | build_4208 |
| Zohocorp | Manageengine M365 Manager Plus | build_4209 |
| Zohocorp | Manageengine M365 Manager Plus | build_4210 |
| Zohocorp | Manageengine M365 Manager Plus | build_4211 |
| Zohocorp | Manageengine M365 Manager Plus | build_4212 |
| Zohocorp | Manageengine M365 Manager Plus | build_4213 |
| Zohocorp | Manageengine M365 Manager Plus | build_4214 |
| Zohocorp | Manageengine M365 Manager Plus | build_4215 |
| Zohocorp | Manageengine M365 Manager Plus | build_4216 |
Showing 50 of 104 affected configurations. See NVD for the full list.
References
- https://www.manageengine.comProduct
- https://www.manageengine.com/microsoft-365-management-reporting/release-notes.html#4421Release Notes, Vendor Advisory
- https://www.manageengine.comProduct
- https://www.manageengine.com/microsoft-365-management-reporting/release-notes.html#4421Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42099?
Zoho ManageEngine M365 Manager Plus before 4421 is vulnerable to file-upload remote code execution.
How severe is CVE-2021-42099?
CVE-2021-42099 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 6.55% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42099?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-42099?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST