How severe is CVE-2021-34426?

CVE-2021-34426 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-34426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34426?

CVE-2021-34426 affects Keybase. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34426?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-34426 published?

CVE-2021-34426 was published on 2021-12-14 and last updated on 2026-06-17.

CVE-2021-34426

CVE-2021-34426 is a medium-severity vulnerability in Keybase with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 7.2
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Keybase
Published: 2021-12-14
Last modified: 2026-06-17

Description

A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the "keybase git lfs-config" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\'s local system.

Frequently asked questions

What is CVE-2021-34426?: A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the "keybase git lfs-config" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\'s local system.
How severe is CVE-2021-34426?: CVE-2021-34426 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-34426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34426?: CVE-2021-34426 affects Keybase. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34426 published?: CVE-2021-34426 was published on 2021-12-14 and last updated on 2026-06-17.

References

https://explore.zoom.us/en/trust/security/security-bulletin

Affected products (1)

cpe:2.3:a:keybase:keybase:*:*:*:*:*:*:*:*

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