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Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability

medcisco_psirtPublished 2026-09-02

<p>A vulnerability in Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 that are running Cisco Session Initiation Protocol (SIP) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.</p> <p>This vulnerability is due to improper memory management when an affected device processes HTTP

Indicators of compromise

Original source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-phone-dos-txMYNRzv?vs_f=Cisco%20Security%20Advisory%26vs_cat=Security%20Intelligence%26vs_type=RSS%26vs_p=Cisco%20Desk%20Phone%209800%20Series,%20IP%20Phone%207800%20and%208800%20Series,%20and%20Video%20Phone%208875%20with%20SIP%20Software%20Denial%20of%20Service%20Vulnerability%26vs_k=1