CVE-2021-37415

Exp

Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

Published: 2021-09-01 Last update: 2025-10-31 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-37415 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 99.58%, 100th percentile). CISA KEV confirms active exploitation (added 2021-12-01) affecting Zoho / ManageEngine ServiceDesk Plus (SDP). a weakness (CWE-306) Unauthenticated remote administrative access may be possible. EPSS rose +6.77% over the last day, indicating growing attacker interest. 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-2021-37415

Name: Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability · CISA KEV detail

Exploit added: 2021-12-01

Action due: 2021-12-15

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2021-37415

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 92.81% 99.58% +6.77%
2 2026-05-10 92.95% 92.81% -0.15%
3 2026-05-07 — 92.95% —

Full EPSS history (41 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-37415

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-2021-37415

Affected software / configurations for CVE-2021-37415

Vendor Product Version Raw CPE
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11005:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11006:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11007:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11008:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11009:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11010:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.0 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.0:11011:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:-:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11100:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11101:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11102:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11103:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11104:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11105:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11106:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11107:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11108:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11109:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11110:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11111:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11112:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11113:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11114:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11115:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11116:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11117:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11118:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11119:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11120:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11121:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11122:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11123:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11124:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11125:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11126:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11127:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11128:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11129:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11130:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11131:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11132:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11133:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11134:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11135:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11136:*:*:*:*:*:*
zohocorp manageengine_servicedesk_plus 11.1 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11137:*:*:*:*:*:*
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 11.2 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.2:-:*:*:*:*:*:*
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 11.3 cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.3:-:*:*:*:*:*:*
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:*:*:*:*:*:*

References for CVE-2021-37415

cvelogic Threat Intelligence