How severe is CVE-2021-37420?

CVE-2021-37420 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-37420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37420?

CVE-2021-37420 primarily affects Zohocorp Manageengine Admanager Plus. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37420?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-37420 published?

CVE-2021-37420 was published on 2021-09-21 and last updated on 2026-06-17.

CVE-2021-37420

CVE-2021-37420 is a medium-severity vulnerability in Zohocorp Manageengine Admanager Plus with a CVSS 3.x base score of 6.5. 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-306.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Zohocorp Manageengine Admanager Plus
Published: 2021-09-21
Last modified: 2026-06-17

Description

Zoho ManageEngine ADSelfService Plus before 6112 is vulnerable to mail spoofing.

Frequently asked questions

What is CVE-2021-37420?: Zoho ManageEngine ADSelfService Plus before 6112 is vulnerable to mail spoofing.
How severe is CVE-2021-37420?: CVE-2021-37420 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-37420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37420?: CVE-2021-37420 primarily affects Zohocorp Manageengine Admanager Plus. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37420 published?: CVE-2021-37420 was published on 2021-09-21 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:zohocorp:manageengine_admanager_plus:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:-:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6100:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6101:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6102:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6103:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6104:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6105:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6106:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6107:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6108:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6109:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6110:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:6.1:6111:*:*:*:*:*:*

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