Is CVE-2023-20226 actively exploited?

No active exploitation of CVE-2023-20226 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-20226 be exploited remotely?

Yes. CVE-2023-20226 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-20226?

CVE-2023-20226 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2023-20226

HIGH

CVE-2023-20226

CWE-456Published: September 27, 2023· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

A vulnerability in Application Quality of Experience (AppQoE) and Unified Threat Defense (UTD) on Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.

This vulnerability is due to the mishandling of a crafted packet stream through the AppQoE or UTD application. An attacker could exploit this vulnerability by sending a crafted packet stream through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

NVD Source

Technical Analysis

CVE-2023-20226 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Cisco28 product(s)

ios xecatalyst 8000v edge1100-4g integrated services router1100-4gltegb integrated services router1100-4gltena integrated services router1100-6g integrated services router4221 integrated services router4321\/k9-rf integrated services router4321\/k9-ws integrated services router4321\/k9 integrated services router4321 integrated services router4331\/k9-rf integrated services router+16

Source: NVD CPE · 38 total CPE entries