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Vulnerability record · CVE-2013-5526 · published 10 October 2013

CVE-2013-5526: Cisco unified ip phone 9951 improper input validation vulnerability

Cisco · Unified Ip Phone 9951

Cisco 9900 fourth-generation IP phones do not properly perform SDP negotiation, which allows remote attackers to cause a denial of service (device reboot) via crafted SDP packets, aka Bug ID CSCuf06698.

7.1 CVSS 2.0 High EPSS 1.8% · top 22.2% CWE-20 · Improper input validation
7.1CVSS 2.0 base score
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

Cisco 9900 fourth-generation IP phones do not properly perform SDP negotiation, which allows remote attackers to cause a denial of service (device reboot) via crafted SDP packets, aka Bug ID CSCuf06698.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/98254
http://secunia.com/advisories/55231
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5526 Vendor Advisory
http://www.securityfocus.com/bid/62905 Third Party AdvisoryVDB Entry
http://osvdb.org/98254
http://secunia.com/advisories/55231
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5526 Vendor Advisory
http://www.securityfocus.com/bid/62905 Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2013-5526), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.