CVE-2023-20018

8.6 HIGH 0.6% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 0.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-01-20 07:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:29 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.6% in the next 30 days (EPSS).
Severity: 8.6 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-01-20 07:15 UTC
Last modified: 2026-06-17 05:29 UTC
Exploit probability: 0.6% · EPSS, next 30 days
Weakness: CWE-288
Record status: Modified

Affected

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

Attack profile CVSS 3.1 · 8.6

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-20018.md and follow it. Check whether this project is affected by CVE-2023-20018. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record