CVE-2021-44077

Exp

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.

Published: 2021-11-29 Last update: 2025-10-31 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44077 is rated Critical Active Threat (98.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 93.51%, 100th percentile). CISA KEV confirms active exploitation (added 2021-12-01) affecting Zoho / ManageEngine ServiceDesk Plus (SDP) / SupportCenter Plus. a weakness (CWE-306) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2021-44077

Name: Zoho ManageEngine ServiceDesk Plus Remote Code Execution Vulnerability · CISA KEV detail

Exploit added: 2021-12-01

Action due: 2021-12-15

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2021-44077

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-44077

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 94.30% 93.51% -0.79%
2 2025-11-21 94.09% 94.30% +0.21%
3 2025-11-18 — 94.09% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44077

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-44077

Affected software / configurations for CVE-2021-44077

Vendor Product Version Raw CPE
zohocorp manageengine_servicedesk_plus < 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:*:*:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11138:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11139:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11140:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11141:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11142:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11143:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11144:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11145:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11200:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11201:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11202:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11203:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11204:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11205:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11206:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11207:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11208:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11209:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11210:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:11211:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11300:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11301:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11302:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11303:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11304:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:11305:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp < 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:*:*:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10500:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10501:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10502:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10503:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10504:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10505:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10506:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10507:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10508:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10509:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10510:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10511:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10512:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10513:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10514:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10515:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10516:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10517:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10518:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10519:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10520:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10521:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10522:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10523:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10524:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10525:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10526:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10527:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10528:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus_msp 10.5 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus_msp:10.5:10529:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus < 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:*:*:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11000:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11001:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11002:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11003:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11004:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11005:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11006:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11007:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11008:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11009:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11010:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11011:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11012:*:*:*:*:*:*
zohocorp manageengine_supportcenter_plus 11.0 cpe:2.3:a:zohocorp:manageengine_supportcenter_plus:11.0:11013:*:*:*:*:*:*

References for CVE-2021-44077

URL Tags
http://packetstormsecurity.com/files/165400/ManageEngine-ServiceDesk-Plus-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
https://pitstop.manageengine.com/portal/en/community/topic/security-advisory-authentication-bypass-vulnerability-in-servicedesk-plus-versions-11138-and-above Patch Vendor Advisory
https://pitstop.manageengine.com/portal/en/community/topic/security-advisory-for-cve-2021-44077-unauthenticated-rce-vulnerability-in-servicedesk-plus-msp-versions-10527-till-10529 Vendor Advisory
https://pitstop.manageengine.com/portal/en/community/topic/security-advisory-for-cve-2021-44077-unauthenticated-rce-vulnerability-in-servicedesk-plus-versions-up-to-11305-22-11-2021 Vendor Advisory
https://pitstop.manageengine.com/portal/en/community/topic/security-advisory-for-cve-2021-44077-unauthenticated-rce-vulnerability-in-supportcenter-plus-versions-11012-and-11013 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-44077 US Government Resource
cvelogic Threat Intelligence