How severe is CVE-2021-40173?

CVE-2021-40173 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-40173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40173?

CVE-2021-40173 primarily affects Zohocorp Manageengine Cloud Security Plus. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40173 published?

CVE-2021-40173 was published on 2021-08-29 and last updated on 2026-06-17.

CVE-2021-40173

CVE-2021-40173 is a high-severity vulnerability in Zohocorp Manageengine Cloud Security Plus with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Zohocorp Manageengine Cloud Security Plus
Published: 2021-08-29
Last modified: 2026-06-17

Description

Zoho ManageEngine Cloud Security Plus before Build 4117 allows a CSRF attack on the server proxy settings.

Frequently asked questions

What is CVE-2021-40173?: Zoho ManageEngine Cloud Security Plus before Build 4117 allows a CSRF attack on the server proxy settings.
How severe is CVE-2021-40173?: CVE-2021-40173 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-40173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40173?: CVE-2021-40173 primarily affects Zohocorp Manageengine Cloud Security Plus. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40173 published?: CVE-2021-40173 was published on 2021-08-29 and last updated on 2026-06-17.

References

https://www.manageengine.com/cloud-security/release-notes.html#build%204117

Affected products (17)

cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4100:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4101:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4102:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4103:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4104:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4105:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4106:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4107:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4108:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4109:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4110:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4111:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4112:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4113:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4115:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_cloud_security_plus:4.1:4116:*:*:*:*:*:*

More vulnerabilities in Zohocorp Manageengine Cloud Security Plus

CVE-2020-24786 — Critical (CVSS 9.8): An issue was discovered in Zoho ManageEngine Exchange Reporter Plus before build number 5510, AD360 before build number…
CVE-2021-44651 — High (CVSS 8.8): Zoho ManageEngine CloudSecurityPlus before Build 4117 allows remote code execution through the…
CVE-2023-35785 — High (CVSS 8.1): Zoho ManageEngine Active Directory 360 versions 4315 and below, ADAudit Plus 7202 and below, ADManager Plus 7200 and…
CVE-2023-6105 — Medium (CVSS 5.5): An information disclosure vulnerability exists in multiple ManageEngine products that can result in encryption keys…

All CVEs affecting Zohocorp Manageengine Cloud Security Plus →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →