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CVE-2017-6627

CWE-399

High

87.0

RPS

Description

A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.

Source: NVD

Signals

CVSS
7.5
High · v3.1
EPSS
6.15%
Probability of exploitation in the next 30 days (FIRST)
CISA KEV
In CISA KEV since Mar 2022
Fix commit
No known fix commit
Sources: MoreFixes, FreshFixes
Weakness
CWE-399
CWE-399, CWE-404
Published
7 Sept 2017
Last modified 22 Apr 2026

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Data as of 8 Oct 2026, 05:16 UK time

CVE-2017-6627 · RPS 87.0 · DevSecure Intelligence