What’s Vulnerable › Vulnerabilities

CVE-2023-20079: Cisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI Vulnerabilities

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-03 · updated 2026-06-17
• Weakness: CWE-121

Description

Multiple vulnerabilities in the web-based management interface of certain Cisco IP Phones could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Ip Phone 6825 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 6841 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 6851 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 6861 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 6871 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 7811 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 7821 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 7832 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 7841 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 7861 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8811 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8831 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8832 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8841 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8845 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8851 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8861 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Ip Phone 8865 Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Unified Ip Phone 7945G Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Unified Ip Phone 7965G Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1
• Cisco Unified Ip Phone 7975G Firmware: before 11.3.7sr1 — fixed in 11.3.7sr1

How to fix

Upgrade to a fixed version: Cisco Ip Phone 6825 Firmware 11.3.7sr1; Cisco Ip Phone 6841 Firmware 11.3.7sr1; Cisco Ip Phone 6851 Firmware 11.3.7sr1; Cisco Ip Phone 6861 Firmware 11.3.7sr1; Cisco Ip Phone 6871 Firmware 11.3.7sr1; Cisco Ip Phone 7811 Firmware 11.3.7sr1; Cisco Ip Phone 7821 Firmware 11.3.7sr1; Cisco Ip Phone 7832 Firmware 11.3.7sr1; Cisco Ip Phone 7841 Firmware 11.3.7sr1; Cisco Ip Phone 7861 Firmware 11.3.7sr1; Cisco Ip Phone 8811 Firmware 11.3.7sr1; Cisco Ip Phone 8831 Firmware 11.3.7sr1. Check the vendor advisory for mitigations.

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ip-phone-cmd-inj-KMFynVcP
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ip-phone-cmd-inj-KMFynVcP

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