VulnerabilityModified

CVE-2020-27888

An issue was discovered on Ubiquiti UniFi Meshing Access Point UAP-AC-M 4.3.21.11325 and UniFi Controller 6.0.28 devices.

HIGH 7.5EPSS 1.01%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.01%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

An issue was discovered on Ubiquiti UniFi Meshing Access Point UAP-AC-M 4.3.21.11325 and UniFi Controller 6.0.28 devices. Cached credentials are not erased from an access point returning wirelessly from a disconnected state. This may provide unintended network access.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 1.01% probability · 61th percentile
CISA KEV: Not listed
Weakness: CWE-459, CWE-522
Affected: ui/unifi meshing access point firmware · ui/unifi controller firmware
Source: cve@mitre.org

References

https://community.ui.com/questions/Possible-authentication-bypass-for-access-into-LAN/7965adb2-5d70-4410-8467-4c7bec76bc00Vendor Advisory
https://community.ui.com/questions/Possible-authentication-bypass-for-access-into-LAN/7965adb2-5d70-4410-8467-4c7bec76bc00Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.