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CVE-2021-44077

98
FAUCET Score

CVE-2021-44077 is a critical unauthenticated remote code execution vulnerability affecting Zoho ManageEngine ServiceDesk Plus, ServiceDesk Plus MSP, and SupportCenter Plus. This flaw, related to /RestAPI URLs and Struts configuration, allows attackers to execute arbitrary code without authentication. With a CVSS score of 9.8 and an EPSS percentile of 0.94252, it poses a severe risk, enabling full compromise of affected systems. This vulnerability is actively exploited in the wild, with public Metasploit modules and Nuclei templates available, and has garnered significant community discussion and media coverage, including warnings from the FBI and CISA.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:*:*:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11138:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11139:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11140:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_servicedesk_plus:11.1:11141:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
93.51%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Dec 1, 2021
Metasploit: ManageEngine ServiceDesk Plus CVE-2021-44077 · Sep 16, 2021
Nuclei: CVE-2021-44077 · Apr 24, 2022
This CVE's current EPSS score of 0.9351 is in the 99th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/165400/ManageEngine-ServiceDesk-Plus-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
pitstop.manageengine.com / portal/en/community/topic/security-advisory-authentication-bypass-vulnerability-in-servicedesk-plus-versions-11138-and-above
PatchVendor Advisory
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
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
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