CVE-2017-12260

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-19 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA50x, SPA51x, and SPA52x Series 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 the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by using formatted specifiers in a SIP payload that is sent 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. This vulnerability affects Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones that are running firmware release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63986.

Affected products

Cisco Spa 501G Firmware: through 7.6.2
Cisco Spa 502G Firmware: through 7.6.2
Cisco Spa 504G Firmware: through 7.6.2
Cisco Spa 508G Firmware: through 7.6.2
Cisco Spa 509G Firmware: through 7.6.2
Cisco Spa 512G Firmware: through 7.6.2
Cisco Spa 514G Firmware: through 7.6.2
Cisco Spa 525G Firmware: through 7.6.2

References

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