CVE-2022-20968: high-severity vulnerability in Cisco Session Initiation Protocol (SIP) Software
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 6.4%
A vulnerability in the Cisco Discovery Protocol processing feature of Cisco IP Phone 7800 and 8800 Series firmware could allow an unauthenticated, adjacent attacker to cause a stack overflow on an affected device.
This vulnerability is due to insufficient input validation of received Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol traffic to an affected device. A successful exploit could allow the attacker to cause a stack overflow, resulting in possible remote code execution or a denial of service (DoS) condition on an affected device.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected products
Cisco · Cisco Session Initiation Protocol (SIP) SoftwareRelated CVEs — Cisco Session Initiation Protocol (SIP) Software
In the same product, most dangerous first.
CVE-2023-20018HIGHCVE-2023-20018EPSS 0.6%CVE-2026-20281HIGHCisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service VulnerabilityEPSS 0.6%CVE-2025-20350HIGHCisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Denial of Service VulnerabilityEPSS 0.5%CVE-2023-20265MEDIUMCVE-2023-20265EPSS 0.5%CVE-2024-20445MEDIUMCisco IP Phone 7800, 8800, and 9800 Series Information Disclosure VulnerabilityEPSS 0.4%CVE-2025-20336MEDIUMCisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Information Disclosure VulnerabilityEPSS 0.4%