Is CVE-2021-44077 in the CISA KEV catalog?

Yes. CVE-2021-44077 is on the CISA Known Exploited Vulnerabilities list, added 2021-12-01.

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

CVE-2021-44077 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-44077?

CVE-2021-44077 has an EPSS score of 93.51% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-44077?

Upgrade manageengine servicedesk plus to 11.1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-44077

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

manageengine servicedesk plusNVD

Affected:< 11.1Fixed in:11.1CVE-2021-44077derived from NVD

manageengine servicedesk plus mspNVD

Affected:< 10.5Fixed in:10.5CVE-2021-44077derived from NVD

manageengine supportcenter plusNVD

Affected:< 11.0Fixed in:11.0CVE-2021-44077derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

93.51%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Zoho ManageEngine ServiceDesk Plus Remote Code Execution Vulnerability

Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014 are vulnerable to unauthenticated remote code execution

Apply updates per vendor instructions.

Remediation due: 2021-12-15

References

Patch1

pitstop.manageengine.com

Exploit1

packetstormsecurity.com

Vendor Advisory3

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-31.