Vulnerability Database

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Total vulnerabilities in the database

CVE-2021-41833 — zohocorp / manageengine_patch_connect_plus

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Zoho ManageEngine Patch Connect Plus before 90099 is vulnerable to unauthenticated remote code execution.

  • Published: Nov 11, 2021
  • Updated: Sep 13, 2026
  • CVE: CVE-2021-41833
  • Severity: Critical
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software Affected versions
zohocorp / manageengine_patch_connect_plus < 9.0.0
zohocorp / manageengine_patch_connect_plus = 9.0.0
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90001
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90063
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90064
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90065
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90066
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90067
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90068
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90069
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90070
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90071
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90072
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90073
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90074
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90075
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90076
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90077
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90078
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90079
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90080
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90081
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90082
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90083
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90084
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90085
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90086
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90087
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90088
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90089
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90090
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90091
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90092
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90093
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90094
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90095
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90096
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90097
zohocorp / manageengine_patch_connect_plus = 9.0.0-build90098

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.