CVE-2025-20350

A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 running Cisco SIP Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to a buffer overflow when an affected device processes HTTP packets. An attacker could exploit this vulnerability by sending crafted HTTP input to the device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To exploit this vulnerability, the phone must be registered to Cisco Unified Communications Manager and have Web Access enabled. Web Access is disabled by default.

• cisco desk phone 9871 firmware (>= 3.0\(1\) <= 3.2\(1\)) • cisco desk phone 9841 firmware (>= 3.0\(1\) <= 3.2\(1\)) • cisco desk phone 9851 firmware (>= 3.0\(1\) <= 3.2\(1\)) • cisco desk phone 9861 firmware (>= 3.0\(1\) <= 3.2\(1\)) • cisco ip phone 8865 firmware (< 14.3\(1\)) • cisco ip phone 8865 firmware 14.3\(1\) • cisco ip phone 7811 firmware (< 14.3\(1\)) • cisco ip phone 7811 firmware 14.3\(1\) • cisco ip phone 7821 firmware (< 14.3\(1\)) • cisco ip phone 7821 firmware 14.3\(1\) • cisco ip phone 7841 firmware (< 14.3\(1\)) • cisco ip phone 7841 firmware 14.3\(1\) • cisco ip phone 7861 firmware (< 14.3\(1\)) • cisco ip phone 7861 firmware 14.3\(1\) • cisco ip phone 8811 firmware (< 14.3\(1\)) • cisco ip phone 8811 firmware 14.3\(1\) • cisco ip phone 8832 firmware (< 14.3\(1\)) • cisco ip phone 8832 firmware 14.3\(1\) • cisco ip phone 8841 firmware (< 14.3\(1\)) • cisco ip phone 8841 firmware 14.3\(1\) • cisco ip phone 8845 firmware (< 14.3\(1\)) • cisco ip phone 8845 firmware 14.3\(1\) • cisco ip phone 8851 firmware (< 14.3\(1\)) • cisco ip phone 8851 firmware 14.3\(1\) • cisco ip phone 8861 firmware (< 14.3\(1\)) • cisco ip phone 8861 firmware 14.3\(1\) • cisco video phone 8875 firmware (< 2.3\(1\)) • cisco video phone 8875 firmware (>= 3.0\(1\) <= 3.2\(1\)) • cisco video phone 8875 firmware 2.3\(1\) • cisco ip phone 8821 firmware (< 11.0\(1\)) • cisco ip phone 8821 firmware 11.0\(0.7\) • cisco ip phone 8821 firmware 11.0\(1\) • cisco ip phone 8821 firmware 11.0\(2\) • cisco ip phone 8821 firmware 11.0\(3\) • cisco ip phone 8821 firmware 11.0\(4\) • cisco ip phone 8821 firmware 11.0\(5\) • cisco ip phone 8821 firmware 11.0\(6\)