CVE 7.4 HIGH

CVE-2025-20311_CVE-2025-20311

7.4 / 10
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Description

A vulnerability in the handling of certain Ethernet frames in Cisco IOS XE Software for Catalyst 9000 Series Switches could allow an unauthenticated, adjacent attacker to cause an egress port to become blocked and drop all outbound traffic.

This vulnerability is due to improper handling of crafted Ethernet frames. An attacker could exploit this vulnerability by sending crafted Ethernet frames through an affected switch. A successful exploit could allow the attacker to cause the egress port to which the crafted frame is forwarded to start dropping all frames, resulting in a denial of service (DoS) condition.

Basic Information

ID CVE-2025-20311
Source cisco
Published Sep 24, 2025 at 17:12
Modified Sep 24, 2025 at 18:07

Affected Product

Vendor Cisco
Product Cisco IOS XE Software
Version 16.6.1
Affected Versions Cisco Cisco IOS XE Software 16.6.1
Cisco Cisco IOS XE Software 16.6.2
Cisco Cisco IOS XE Software 16.6.3
Cisco Cisco IOS XE Software 16.6.4
Cisco Cisco IOS XE Software 16.6.5
Cisco Cisco IOS XE Software 16.6.4a
Cisco Cisco IOS XE Software 16.6.6
Cisco Cisco IOS XE Software 16.6.7
Cisco Cisco IOS XE Software 16.6.8
Cisco Cisco IOS XE Software 16.6.9
Cisco Cisco IOS XE Software 16.6.10
Cisco Cisco IOS XE Software 16.7.1
Cisco Cisco IOS XE Software 16.8.1
Cisco Cisco IOS XE Software 16.8.1a
Cisco Cisco IOS XE Software 16.8.1s
Cisco Cisco IOS XE Software 16.9.1
Cisco Cisco IOS XE Software 16.9.2
Cisco Cisco IOS XE Software 16.9.1s
Cisco Cisco IOS XE Software 16.9.3
Cisco Cisco IOS XE Software 16.9.4
Cisco Cisco IOS XE Software 16.9.5
Cisco Cisco IOS XE Software 16.9.6
Cisco Cisco IOS XE Software 16.9.7
Cisco Cisco IOS XE Software 16.9.8
Cisco Cisco IOS XE Software 16.10.1
Cisco Cisco IOS XE Software 16.10.1s
Cisco Cisco IOS XE Software 16.10.1e
Cisco Cisco IOS XE Software 16.11.1
Cisco Cisco IOS XE Software 16.11.1b
Cisco Cisco IOS XE Software 16.11.1s
Cisco Cisco IOS XE Software 16.12.1
Cisco Cisco IOS XE Software 16.12.1s
Cisco Cisco IOS XE Software 16.12.1c
Cisco Cisco IOS XE Software 16.12.2
Cisco Cisco IOS XE Software 16.12.3
Cisco Cisco IOS XE Software 16.12.8
Cisco Cisco IOS XE Software 16.12.2s
Cisco Cisco IOS XE Software 16.12.4
Cisco Cisco IOS XE Software 16.12.3s
Cisco Cisco IOS XE Software 16.12.3a
Cisco Cisco IOS XE Software 16.12.4a
Cisco Cisco IOS XE Software 16.12.5
Cisco Cisco IOS XE Software 16.12.6
Cisco Cisco IOS XE Software 16.12.5b
Cisco Cisco IOS XE Software 16.12.6a
Cisco Cisco IOS XE Software 16.12.7
Cisco Cisco IOS XE Software 16.12.14
Cisco Cisco IOS XE Software 17.1.1
Cisco Cisco IOS XE Software 17.1.1s
Cisco Cisco IOS XE Software 17.1.1t
Cisco Cisco IOS XE Software 17.1.3
Cisco Cisco IOS XE Software 17.2.1
Cisco Cisco IOS XE Software 17.2.1a
Cisco Cisco IOS XE Software 17.3.1
Cisco Cisco IOS XE Software 17.3.2
Cisco Cisco IOS XE Software 17.3.3
Cisco Cisco IOS XE Software 17.3.2a
Cisco Cisco IOS XE Software 17.3.4
Cisco Cisco IOS XE Software 17.3.5
Cisco Cisco IOS XE Software 17.3.6
Cisco Cisco IOS XE Software 17.3.4b
Cisco Cisco IOS XE Software 17.3.7
Cisco Cisco IOS XE Software 17.3.8
Cisco Cisco IOS XE Software 17.3.8a
Cisco Cisco IOS XE Software 17.4.1
Cisco Cisco IOS XE Software 17.5.1
Cisco Cisco IOS XE Software 17.6.1
Cisco Cisco IOS XE Software 17.6.2
Cisco Cisco IOS XE Software 17.6.3
Cisco Cisco IOS XE Software 17.6.1y
Cisco Cisco IOS XE Software 17.6.4
Cisco Cisco IOS XE Software 17.6.5
Cisco Cisco IOS XE Software 17.6.6
Cisco Cisco IOS XE Software 17.6.6a
Cisco Cisco IOS XE Software 17.6.5a
Cisco Cisco IOS XE Software 17.6.7
Cisco Cisco IOS XE Software 17.6.8
Cisco Cisco IOS XE Software 17.7.1
Cisco Cisco IOS XE Software 17.10.1
Cisco Cisco IOS XE Software 17.10.1b
Cisco Cisco IOS XE Software 17.8.1
Cisco Cisco IOS XE Software 17.9.1
Cisco Cisco IOS XE Software 17.9.2
Cisco Cisco IOS XE Software 17.9.3
Cisco Cisco IOS XE Software 17.9.4
Cisco Cisco IOS XE Software 17.9.5
Cisco Cisco IOS XE Software 17.9.4a
Cisco Cisco IOS XE Software 17.9.6
Cisco Cisco IOS XE Software 17.9.6a
Cisco Cisco IOS XE Software 17.11.1
Cisco Cisco IOS XE Software 17.12.1
Cisco Cisco IOS XE Software 17.12.2
Cisco Cisco IOS XE Software 17.12.3
Cisco Cisco IOS XE Software 17.12.4
Cisco Cisco IOS XE Software 17.12.1z3
Cisco Cisco IOS XE Software 17.13.1
Cisco Cisco IOS XE Software 17.14.1
Cisco Cisco IOS XE Software 17.11.99SW
Cisco Cisco IOS XE Software 17.15.1
Cisco Cisco IOS XE Software 17.15.2
Cisco Cisco IOS XE Software 17.15.2a
Cisco Cisco IOS XE Software 17.15.2b
Cisco Cisco IOS XE Software 17.16.1

References

💭 Join the Security Discussion

🔒 Your email address will not be published. Required fields are marked *

⚠️ Please be respectful and constructive in your comments. Security discussions should remain professional.