Desk Phone 9851 Firmware vulnerabilities

2 known vulnerabilities in Desk Phone 9851 Firmware from Cisco. 2 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 7.5 High severity

  Cisco Session Initiation Protocol (SIP) Software: Stack-based Buffer Overflow

  CVE-2025-20350Oct 15, 2025Cisco

  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 vulne

• 7.5 High severity

  Cisco Session Initiation Protocol (SIP) Software: Exposure of Sensitive Information to an Unauthorized Actor

  CVE-2025-20336Sep 3, 2025Cisco

  A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to access sensitive information on an affected device. This vulnerabil