CVE-2018-0389

A vulnerability in the implementation of Session Initiation Protocol (SIP) processing in Cisco Small Business SPA514G IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. Cisco has not released software updates that address this vulnerability. This vulnerability affects Cisco Small Business SPA514G IP Phones that are running firmware release 7.6.2SR2 or earlier.

• CWE-399

• http://www.securityfocus.com/bid/107402Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190313-sipVendor Advisory
• http://www.securityfocus.com/bid/107402Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190313-sipVendor Advisory

Published

Mar 13, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-0383A vulnerability in the detection engine of Cisco FireSIGHT S…
• CVE-2018-0384A vulnerability in the detection engine of Cisco FireSIGHT S…
• CVE-2018-0385A vulnerability in the detection engine parsing of Security …7.5
• CVE-2018-0386A vulnerability in Cisco Unified Communications Domain Manag…
• CVE-2018-0387A vulnerability in Cisco Webex Teams (for Windows and macOS)…8.8
• CVE-2018-0388A vulnerability in the web-based interface of Cisco Wireless…4.8
• CVE-2018-0390A vulnerability in the web framework of Cisco Webex could al…
• CVE-2018-0391A vulnerability in the password change function of Cisco Pri…
• CVE-2018-0392A vulnerability in the CLI of Cisco Policy Suite could allow…
• CVE-2018-0393A Read-Only User Effect Change vulnerability in the Policy B…
• CVE-2018-0394A vulnerability in the web upload function of Cisco Cloud Se…
• CVE-2018-0395A vulnerability in the Link Layer Discovery Protocol (LLDP) …8.8