CVE-2025-20191 — Buffer Access with Incorrect Length Value in Cisco Nx-os Software

CWE-805 — Buffer Access with Incorrect Length Value4 documents4 sources

Severity

7.4HIGHNVD

EPSS

0.1%

top 73.11%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Cisco Nx-os Software Cisco Wireless LAN Controller

Timeline

PublishedMay 7

Description

A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to an affected device. A successful expl…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 2.8 | Impact: 4.0

Affected Packages2 packages

▶CVEListV5cisco/cisco_nx-os_software119 versions+118

▶CVEListV5cisco/cisco_wireless_lan_controller84 versions+83

🔴Vulnerability Details

GHSA

GHSA-vx24-6mq3-c5cq: A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wirele↗2025-05-07

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CVEList

Multiple Cisco Products Denial of Service Vulnerability↗2025-05-07

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📋Vendor Advisories

Cisco

Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability↗2025-05-07

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