CVE-2017-12259

Name: CVE-2017-12259
Creator: NVD / NIST
Published: 2017-10-19T08:29:00.263+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.30%

Last modified Jun 17, 2026

CVE-2017-12259 is a vulnerability of currently unknown severity. A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA51x 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. EPSS estimates a 2.30% chance of exploitation in the next 30 days.

Description

A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA51x 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 sending malformed 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. This vulnerability affects Cisco Small Business SPA51x Series IP Phones that are running Cisco SPA51x Firmware Release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63982.

Metrics

EPSS Probability

2.30%

81.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Cisco	Small Business Ip Phone Firmware	<= 7.6.2	Sr1

References

http://www.securityfocus.com/bid/101488Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039615Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-sipVendor Advisory
http://www.securityfocus.com/bid/101488Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039615Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-sipVendor Advisory

Timeline

Published: Oct 19, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12259?

How severe is CVE-2017-12259?

Severity scoring for CVE-2017-12259 is pending analysis. The EPSS model estimates a 2.30% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12259?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-12259?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST