How severe is CVE-2020-8157?

CVE-2020-8157 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8157 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8157?

CVE-2020-8157 primarily affects Ui Unifi Cloud Key Gen2 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8157?

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

When was CVE-2020-8157 published?

CVE-2020-8157 was published on 2020-05-02 and last updated on 2026-06-17.

CVE-2020-8157

CVE-2020-8157 is a medium-severity vulnerability in Ui Unifi Cloud Key Gen2 Firmware with a CVSS 3.x base score of 6.8. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Ui Unifi Cloud Key Gen2 Firmware
Published: 2020-05-02
Last modified: 2026-06-17

Description

UniFi Cloud Key firmware <= v1.1.10 for Cloud Key gen2 and Cloud Key gen2 Plus contains a vulnerability that allows unrestricted root access through the serial interface (UART).

Frequently asked questions

What is CVE-2020-8157?: UniFi Cloud Key firmware <= v1.1.10 for Cloud Key gen2 and Cloud Key gen2 Plus contains a vulnerability that allows unrestricted root access through the serial interface (UART).
How severe is CVE-2020-8157?: CVE-2020-8157 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8157 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8157?: CVE-2020-8157 primarily affects Ui Unifi Cloud Key Gen2 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8157?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8157 published?: CVE-2020-8157 was published on 2020-05-02 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:ui:unifi_cloud_key_gen2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:unifi_cloud_key_gen2_plus_firmware:*:*:*:*:*:*:*:*

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