CVE-2007-0648

What it is

Cisco IOS after 12.3(14)T, 12.3(8)YC1, 12.3(8)YG, and 12.4, with voice support and without Session Initiated Protocol (SIP) configured, allows remote attackers to cause a denial of service (crash) by sending a crafted packet to port 5060/UDP.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

3.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2007-02-01 01:28 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:35 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.7% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2007-02-01 01:28 UTC

Last modified

2026-06-16 22:35 UTC

Exploit probability

3.7% · EPSS, next 30 days

Record status

Modified

Affected

• Cisco iOS 12.3\(14\)t
• Cisco iOS 12.3\(14\)t2
• Cisco iOS 12.3\(14\)t4
• Cisco iOS 12.3\(14\)t5
• Cisco iOS 12.3yg
• Cisco iOS 12.3yk
• Cisco iOS 12.3ym
• Cisco iOS 12.3yq

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

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