How severe is CVE-2021-20136?

CVE-2021-20136 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-2021-20136 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20136?

CVE-2021-20136 primarily affects Zohocorp Manageengine Log360. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20136?

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-2021-20136 published?

CVE-2021-20136 was published on 2021-11-01 and last updated on 2026-06-17.

CVE-2021-20136

CVE-2021-20136 is a critical-severity vulnerability in Zohocorp Manageengine Log360 with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Zohocorp Manageengine Log360
Published: 2021-11-01
Last modified: 2026-06-17

Description

ManageEngine Log360 Builds < 5235 are affected by an improper access control vulnerability allowing database configuration overwrite. An unauthenticated remote attacker can send a specially crafted message to Log360 to change its backend database to an attacker-controlled database and to force Log360 to restart. An attacker can leverage this vulnerability to achieve remote code execution by replacing files executed by Log360 on startup.

Frequently asked questions

What is CVE-2021-20136?: ManageEngine Log360 Builds < 5235 are affected by an improper access control vulnerability allowing database configuration overwrite. An unauthenticated remote attacker can send a specially crafted message to Log360 to change its backend database to an attacker-controlled database and to force Log360 to restart. An attacker can leverage this vulnerability to achieve remote code execution by replacing files executed by Log360 on startup.
How severe is CVE-2021-20136?: CVE-2021-20136 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-2021-20136 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20136?: CVE-2021-20136 primarily affects Zohocorp Manageengine Log360. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20136?: 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-2021-20136 published?: CVE-2021-20136 was published on 2021-11-01 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2021-48

Affected products (4)

cpe:2.3:a:zohocorp:manageengine_log360:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.3:build5232:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.3:build5233:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.3:build5234:*:*:*:*:*:*

More vulnerabilities in Zohocorp Manageengine Log360

CVE-2021-40177 — Critical (CVSS 9.8): Zoho ManageEngine Log360 before Build 5225 allows remote code execution via BCP file overwrite.
CVE-2021-40175 — Critical (CVSS 9.8): Zoho ManageEngine Log360 before Build 5219 allows unrestricted file upload with resultant remote code execution.
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-2021-40174 — High (CVSS 8.8): Zoho ManageEngine Log360 before Build 5224 allows a CSRF attack for disabling the logon security settings.
CVE-2021-40172 — High (CVSS 8.8): Zoho ManageEngine Log360 before Build 5219 allows a CSRF attack on proxy settings.
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…

All CVEs affecting Zohocorp Manageengine Log360 →

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