CVE-2023-20018

Name: CVE-2023-20018
Creator: NVD / NIST
Published: 2023-01-20T07:15:13.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2023-20018 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.61%

44.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ip Phone 7800 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 7811 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 7821 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 7832 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 7841 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 7861 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8800 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8811 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8821 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8821-Ex Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8831 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8832 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8841 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8845 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8851 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8861 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phone 8865 Firmware	< 14.1\(1\)sr2
Cisco	Ip Phones 8832 Firmware	< 14.1\(1\)sr2
Cisco	Unified Ip Phone 8851nr Firmware	< 14.1\(1\)sr2
Cisco	Unified Ip Phone 8865nr Firmware	< 14.1\(1\)sr2
Cisco	Wireless Ip Phone 8821 Firmware	< 11.0\(6\)sr4
Cisco	Wireless Ip Phone 8821-Ex Firmware	< 11.0\(6\)sr4

References

Timeline

Published: Jan 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-20018?

How severe is CVE-2023-20018?

CVE-2023-20018 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2023-20018?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-20018?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST