How severe is CVE-2021-46386?

CVE-2021-46386 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-2021-46386 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46386?

CVE-2021-46386 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-46386?

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-2021-46386 published?

CVE-2021-46386 was published on 2022-01-26 and last updated on 2026-06-17.

CVE-2021-46386

CVE-2021-46386 is a critical-severity vulnerability in Mingsoft Mcms 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: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Mingsoft Mcms
Published: 2022-01-26
Last modified: 2026-06-17

Description

File upload vulnerability in mingSoft MCMS through 5.2.5, allows remote attackers to execute arbitrary code via a crafted jspx webshell to net.mingsoft.basic.action.web.FileAction#upload.

Frequently asked questions

What is CVE-2021-46386?: File upload vulnerability in mingSoft MCMS through 5.2.5, allows remote attackers to execute arbitrary code via a crafted jspx webshell to net.mingsoft.basic.action.web.FileAction#upload.
How severe is CVE-2021-46386?: CVE-2021-46386 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-2021-46386 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46386?: CVE-2021-46386 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-46386?: 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-2021-46386 published?: CVE-2021-46386 was published on 2022-01-26 and last updated on 2026-06-17.

References

https://gitee.com/mingSoft/MCMS/issues/I4R0GW

Affected products (1)

cpe:2.3:a:mingsoft:mcms:*:*:*:*:*:*:*:*

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