How severe is CVE-2021-37539?

CVE-2021-37539 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-37539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 93% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37539?

CVE-2021-37539 primarily affects Zohocorp Manageengine Admanager Plus. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37539?

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

When was CVE-2021-37539 published?

CVE-2021-37539 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-37539

CVE-2021-37539 is a critical-severity vulnerability in Zohocorp Manageengine Admanager Plus with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 93% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 93% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Zohocorp Manageengine Admanager Plus
Published: 2021-09-27
Last modified: 2026-06-17

Description

Zoho ManageEngine ADManager Plus before 7111 is vulnerable to unrestricted file which leads to Remote code execution.

Frequently asked questions

What is CVE-2021-37539?: Zoho ManageEngine ADManager Plus before 7111 is vulnerable to unrestricted file which leads to Remote code execution.
How severe is CVE-2021-37539?: CVE-2021-37539 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-37539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 93% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37539?: CVE-2021-37539 primarily affects Zohocorp Manageengine Admanager Plus. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37539?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-37539 published?: CVE-2021-37539 was published on 2021-09-27 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:zohocorp:manageengine_admanager_plus:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:7.1:-:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:7.1:7100:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:7.1:7101:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:7.1:7102:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_admanager_plus:7.1:7110:*:*:*:*:*:*

More vulnerabilities in Zohocorp Manageengine Admanager Plus

CVE-2022-47966 — Critical (CVSS 9.8): Multiple Zoho ManageEngine on-premise products, such as ServiceDesk Plus through 14003, allow remote code execution due…
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