What is the CVSS score of CVE-2021-44077?

CVE-2021-44077 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 93.5%.

Is there a public PoC exploit available for CVE-2021-44077?

Yes, a public proof-of-concept exploit is available for CVE-2021-44077. Prioritise patching immediately. EPSS: 93.5%.

Is there a patch available for CVE-2021-44077?

Yes, a patch is available for CVE-2021-44077. Update the affected software to the latest version immediately.

Zoho CVE-2021-44077

CRITICAL

Missing Authentication for Critical Function (CWE-306)

2021-11-29 cve@mitre.org

RCE Zoho Authentication Bypass Manageengine Servicedesk Plus Manageengine Servicedesk Plus Msp Manageengine Supportcenter Plus

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Nov 29, 2021 - 04:15 nvd

CRITICAL 9.8

DescriptionNVD

Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014 are vulnerable to unauthenticated remote code execution. This is related to /RestAPI URLs in a servlet, and ImportTechnicians in the Struts configuration.

AnalysisAI

Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014 are vulnerable to unauthenticated remote code execution. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014 are vulnerable to unauthenticated remote code execution. This is related to /RestAPI URLs in a servlet, and ImportTechnicians in the Struts configuration. Affected products include: Zohocorp Manageengine Servicedesk Plus, Zohocorp Manageengine Servicedesk Plus Msp, Zohocorp Manageengine Supportcenter Plus. Version information: before 11306.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Require authentication for all sensitive operations, implement defense in depth.