Multiple Vulnerabilities Affecting Cisco IOS XE Products

Cisco is a network equipment manufacturer whose IOS XE operating system equips a wide range of switches and routers deployed in professional environments. As part of an internal security review, Cisco has fixed seven vulnerabilities affecting IOS XE Software. These products are affected by several vulnerabilities labeled as follows: CVE-2026-20267 (CVSS 9.0): Authorization bypass via an access control flaw (CWE-284), which could lead to escalation of privileges; CVE-2026-20268 (CVSS 8.6): Memory corruption due to a fault in restricting operations on a memory area (CWE-119), exploitable by memory overflow; CVE-2026-20269 (CVSS 8.6): Compromise via a resource lifecycle control flaw (CWE-664), affecting memory and file managers; CVE-2026-20270 (CVSS 8.6): Compromise via calculation error (CWE-682), covering arithmetic or numeric conversion errors; CVE-2026-20271 (CVSS 8.6): Denial of service via insufficient control flow management (CWE-691), potentially leading to infinite loops or race conditions; CVE-2026-20272 (CVSS 9.8): Execution of arbitrary commands via incorrect neutralization of special elements (CWE-74), exploitable without prior authentication; CVE-2026-20273 (CVSS 8.6): Unauthorized access to files, allowing circumvention of file system access restrictions. Given the criticality of these vulnerabilities, it is strongly recommended to immediately apply the security updates published by Cisco to all affected equipment.

• Cisco devices running IOS;