How severe is CVE-2023-20226?

CVE-2023-20226 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-20226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-20226?

CVE-2023-20226 primarily affects Cisco Ios Xe. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-20226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-20226 published?

CVE-2023-20226 was published on 2023-09-27 and last updated on 2026-06-17.

CVE-2023-20226

CVE-2023-20226 is a high-severity vulnerability in Cisco Ios Xe with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-456.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-456
Affected product: Cisco Ios Xe
Published: 2023-09-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-20226?: 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.
How severe is CVE-2023-20226?: CVE-2023-20226 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-20226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-20226?: CVE-2023-20226 primarily affects Cisco Ios Xe. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-20226?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-20226 published?: CVE-2023-20226 was published on 2023-09-27 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appqoe-utd-dos-p8O57p5y

Affected products (11)

cpe:2.3:o:cisco:ios_xe:17.7.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.7.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.7.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.8.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.8.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.9.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.9.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.9.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.9.2a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.10.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.10.1a:*:*:*:*:*:*:*

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