How severe is CVE-2021-3134?

CVE-2021-3134 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3134?

CVE-2021-3134 affects Mubu. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3134?

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

When was CVE-2021-3134 published?

CVE-2021-3134 was published on 2021-01-12 and last updated on 2026-06-17.

CVE-2021-3134

CVE-2021-3134 is a high-severity vulnerability in Mubu with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mubu
Published: 2021-01-12
Last modified: 2026-06-17

Description

Mubu 2.2.1 allows local users to gain privileges to execute commands, aka CNVD-2020-68878.

Frequently asked questions

What is CVE-2021-3134?: Mubu 2.2.1 allows local users to gain privileges to execute commands, aka CNVD-2020-68878.
How severe is CVE-2021-3134?: CVE-2021-3134 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3134?: CVE-2021-3134 affects Mubu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3134?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-3134 published?: CVE-2021-3134 was published on 2021-01-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mubu:mubu:2.2.1:*:*:*:*:*:*:*