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CVE-2018-0151

CRITICAL CISA KEV

A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges. The vulnerability is due to incorrect bounds checking of certain values in packets that are destined for UDP port 18999 of an affected device. An attacker could exploit this vulnerability by sending malicious packets to an affected device. When the packets are processed, an exploitable buffer overflow condition may occur. A successful exploit could allow the attacker to execute arbitrary code on the affected device with elevated privileges. The attacker could also leverage this vulnerability to cause the device to reload, causing a temporary DoS condition while the device is reloading. The malicious packets must be destined to and processed by an affected device. Traffic transiting a device will not trigger the vulnerability. Cisco Bug IDs: CSCvf73881.

Published: Mar 28, 2018 Modified: Jun 17, 2026
CWE-119 CWE-119

CVSS Metrics

CVSSv3
Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (2)

Vendor Product Version
cisco ios_xe 16.5.1
cisco ios_xe -

GitHub Security Advisory GHSA-mpwr-vh8m-qpfg

A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE...

Risk Scores

CVSS Score 9.8 / 10
EPSS Score 14.29%

Top 4% most likely to be exploited

Threat Score 73.5 / 100

CISA Known Exploited

Date Added: 2022-03-03
Due Date: 2022-03-17
Required Action:

Apply updates per vendor instructions.

Data Sources

NVD CISA KEV EPSS GitHub