What is CVE-2023-20126?

CVE-2023-20126 is a critical-severity vulnerability in Cisco Small Business Ip Phones, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2023-05-04.

How severe is CVE-2023-20126?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-20126 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Cisco Small Business Ip Phones

CVE-2023-20126

A vulnerability in the web-based management interface of Cisco SPA112 2-Port Phone Adapters could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to a missing authenticat…

Vulnerability class: Broken Authentication

EPSS: 0.699 (98.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cisco Small Business Ip Phones — versions n/a

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

References

20230503 Cisco SPA112 2-Port Phone Adapters Remote Command Execution Vulnerability (vendor-advisory)

Frequently asked questions

What is CVE-2023-20126?: CVE-2023-20126 is a critical-severity vulnerability in Cisco Small Business Ip Phones, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2023-05-04.
How severe is CVE-2023-20126?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-20126 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.