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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.
Use CWE-121, Cisco vendor hub and Ip Phone 6871 Firmware product page to widen CVE-2023-20079 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2023-20078, CVE-2020-3111 and CVE-2022-20774 for nearby disclosures in the same product family. Additional editorial context is available in The Weekly Cybersecurity Brief: January 30th, 2026.