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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.45% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-121
- Affected
- cisco/desk phone 9871 firmware · cisco/desk phone 9841 firmware · cisco/desk phone 9851 firmware · cisco/desk phone 9861 firmware · cisco/ip phone 8865 firmware · cisco/ip phone 7811 firmware · cisco/ip phone 7821 firmware · cisco/ip phone 7841 firmware · cisco/ip phone 7861 firmware · cisco/ip phone 8811 firmware · cisco/ip phone 8832 firmware · cisco/ip phone 8841 firmware · cisco/ip phone 8845 firmware · cisco/ip phone 8851 firmware · cisco/ip phone 8861 firmware · cisco/video phone 8875 firmware · cisco/ip phone 8821 firmware
- Source
- psirt@cisco.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.