How severe is CVE-2020-28653?

CVE-2020-28653 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-2020-28653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 79% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28653?

CVE-2020-28653 primarily affects Zohocorp Manageengine Opmanager. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-28653?

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-2020-28653 published?

CVE-2020-28653 was published on 2021-02-03 and last updated on 2026-06-17.

CVE-2020-28653

CVE-2020-28653 is a critical-severity vulnerability in Zohocorp Manageengine Opmanager with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 79% places it in the 100th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 79% (100th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zohocorp Manageengine Opmanager
Published: 2021-02-03
Last modified: 2026-06-17

Description

Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.

Frequently asked questions

What is CVE-2020-28653?: Zoho ManageEngine OpManager Stable build before 125203 (and Released build before 125233) allows Remote Code Execution via the Smart Update Manager (SUM) servlet.
How severe is CVE-2020-28653?: CVE-2020-28653 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-2020-28653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 79% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28653?: CVE-2020-28653 primarily affects Zohocorp Manageengine Opmanager. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-28653?: 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-2020-28653 published?: CVE-2020-28653 was published on 2021-02-03 and last updated on 2026-06-17.

References

Affected products (59)

cpe:2.3:a:zohocorp:manageengine_opmanager:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125000:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125002:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125100:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125101:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125102:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125108:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125110:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125111:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125112:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125113:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125114:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125116:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125117:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125118:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125120:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125121:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125123:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125124:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125125:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125136:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125137:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125139:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125140:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125143:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125144:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125145:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125156:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125157:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125158:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125159:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125161:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125163:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125174:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125175:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125176:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125177:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125178:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125180:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125181:*:*:*:*:*:*

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