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CVE-2019-1923: Cisco Small Business SPA500 Series IP Phones Local Command Execution Vulnerability

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-17 · updated 2026-06-17
• Weakness: CWE-77

Description

A vulnerability in Cisco Small Business SPA500 Series IP Phones could allow a physically proximate attacker to execute arbitrary commands on the device. The vulnerability is due to improper input validation in the device configuration interface. An attacker could exploit this vulnerability by accessing the configuration interface, which may require a password, and then accessing the device's physical interface and inserting a USB storage device. A successful exploit could allow the attacker to execute arbitrary commands on the device in an elevated security context. At the time of publication, this vulnerability affected Cisco Small Business SPA500 Series IP Phones firmware releases 7.6.2SR5 and prior.

Affected products

• Cisco Spa500Ds Firmware: through 7.6.2sr5
• Cisco Spa500S Firmware: through 7.6.2sr5
• Cisco Spa501G Firmware: through 7.6.2sr5
• Cisco Spa502G Firmware: through 7.6.2sr5
• Cisco Spa504G Firmware: through 7.6.2sr5
• Cisco Spa508G Firmware: through 7.6.2sr5
• Cisco Spa509G Firmware: through 7.6.2sr5
• Cisco Spa512G Firmware: through 7.6.2sr5
• Cisco Spa514G Firmware: through 7.6.2sr5
• Cisco Spa525G2 Firmware: through 7.6.2sr5

References

• http://www.securityfocus.com/bid/109294
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-spa500-command
• http://www.securityfocus.com/bid/109294
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-spa500-command

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