A vulnerability in the Session Initiation Protocol (SIP) implementation of Cisco IP Phone 8851 11.0(0.1) could allow an unauthenticated, re…

Published 9 y ago 2017-05-22 · modified 4 mo ago 2026-06-17 · JSON

CVSS

5.3

v3.0 · NVD

CISA KEV

not known exploited

EPSS

2.4%

percentile 84%

Public exploits

none known

A vulnerability in the Session Initiation Protocol (SIP) implementation of Cisco IP Phone 8851 11.0(0.1) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to an abnormal SIP message. An attacker could exploit this vulnerability by manipulating the CANCEL packet. An exploit could allow the attacker to cause a disruption of service to the phone. Cisco Bug IDs: CSCvc34795.

Exploit prediction (EPSS)

2.37% probability of exploitation in the next 30 days, higher than 84% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	5.3	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`
NVD	2.0	7.8	`AV:N/AC:L/Au:N/C:N/I:N/A:C`

Affected products

n/a Cisco IP Phone 8851

Classification

Weakness

CWE-399 Resource Management Errors

References

securitytracker.com /id/1038511 · vdb-entry, x_refsource_SECTRACK, x_transferred
tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20170517-sip · x_refsource_CONFIRM, x_transferred
securityfocus.com /bid/98533 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2017-6630
NVD: CVE-2017-6630

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.