How severe is CVE-2021-41833?

CVE-2021-41833 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-2021-41833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41833?

CVE-2021-41833 primarily affects Zohocorp Manageengine Patch Connect Plus. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41833?

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-2021-41833 published?

CVE-2021-41833 was published on 2021-11-11 and last updated on 2026-06-17.

CVE-2021-41833

CVE-2021-41833 is a critical-severity vulnerability in Zohocorp Manageengine Patch Connect Plus with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 8% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Zohocorp Manageengine Patch Connect Plus
Published: 2021-11-11
Last modified: 2026-06-17

Description

Zoho ManageEngine Patch Connect Plus before 90099 is vulnerable to unauthenticated remote code execution.

Frequently asked questions

What is CVE-2021-41833?: Zoho ManageEngine Patch Connect Plus before 90099 is vulnerable to unauthenticated remote code execution.
How severe is CVE-2021-41833?: CVE-2021-41833 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-2021-41833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41833?: CVE-2021-41833 primarily affects Zohocorp Manageengine Patch Connect Plus. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41833?: 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-2021-41833 published?: CVE-2021-41833 was published on 2021-11-11 and last updated on 2026-06-17.

References

Affected products (39)

cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:-:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90001:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90063:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90064:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90065:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90066:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90067:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90068:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90069:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90070:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90071:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90072:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90073:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90074:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90075:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90076:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90077:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90078:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90079:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90080:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90081:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90082:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90083:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90084:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90085:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90086:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90087:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90088:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90089:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90090:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90091:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90092:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90093:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90094:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90095:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90096:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90097:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_patch_connect_plus:9.0.0:build90098:*:*:*:*:*:*

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