What’s Vulnerable › Vulnerabilities
CVE-2019-1922: Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability
- Severity: high (CVSS 7.5 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-07-06 · updated 2026-06-17
- Weakness: CWE-476
Description
A vulnerability in Cisco SIP IP Phone Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected phone. The vulnerability is due to insufficient validation of input Session Initiation Protocol (SIP) packets. An attacker could exploit this vulnerability by altering the SIP replies that are sent to the affected phone during the registration process. A successful exploit could allow the attacker to cause the phone to reboot and not complete the registration process.
Affected products
- Cisco Ip Conference Phone 7832 Firmware: all versions
- Cisco Ip Conference Phone 8832 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 7811 Firmware: all versions
- Cisco Ip Phone 7821 Firmware: all versions
- Cisco Ip Phone 7841 Firmware: all versions
- Cisco Ip Phone 7861 Firmware: all versions
- Cisco Ip Phone 8811 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 8841 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 8845 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 8851 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 8861 Firmware: 11.5(1), 12.5(1)
- Cisco Ip Phone 8865 Firmware: 11.5(1), 12.5(1)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-ip-phone-sip-dos
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-ip-phone-sip-dos
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