CVE-2026-20104

Cisco IOS XE bootloader vulnerability (CVE-2026-20104) affects Catalyst 9200 series, ESS9300 Embedded, IE9310/IE9320 Rugged, and IE3500/IE3505 Rugged switches. Root cause: insufficient validation of boot-time software, allowing manipulation of loaded binaries to bypass boot-time integrity checks ...

Cisco多款产品 安全漏洞

The Cisco Catalyst 9200 Series Switches are switches produced by the American company Cisco. The Cisco Catalyst is a series of switches developed by Cisco. Several of Cisco’s products have security vulnerabilities. These vulnerabilities stem from insufficient software validation during startup,...

Input validation

A vulnerability in the software image verification functionality of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. This vulnerability is due to an improper check in the code function tha...

Cisco Catalyst 9200 Series Switches 数据伪造问题漏洞

Cisco Catalyst 9200 Series Switches is a switch from Cisco, U.S. A data forgery vulnerability exists in the software image validation feature of Cisco Catalyst 9200 Series Switches, which could be exploited by an attacker to execute unsigned code at system startup...

Cisco Catalyst 9200 Series Switches Jumbo Frame DoS (cisco-sa-JP-DOS-g5FfGm8y)

According to its self-reported version, Cisco IOS XE Software is affected by a denial of service vulnerability due to insufficient packet size validation. An unauthenticated, remote attacker can exploit this, by sending jumbo frames or frames larger than the configured MTU size to the management...

Cisco IOS XE Denial of Service Vulnerability (CNVD-2021-43441)

Cisco IOS XE is a set of modular operating system based on Linux kernel developed by Cisco for its network equipment. A denial-of-service vulnerability exists in the Umbrella Connector component of Cisco IOS XE used in Cisco Catalyst 9200 series switches, which can be exploited by an attacker by...

Cisco Catalyst 9200 Series Switch Denial of Service Vulnerability

The Cisco Catalyst 9200 is a family of entry-level stackable enterprise network switches from Cisco. A denial-of-service vulnerability exists in the Polaris kernel of the Cisco Catalyst 9200 series switches, which can be exploited by an attacker to cause a complete device crash by sending jumbo...

CVE-2020-3527

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device. The vulnerability is due to insufficient packet size validation. An attacker could exploit this vulnerability by sending jumbo frames or frames larger...

CVE-2020-3527

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device. The vulnerability is due to insufficient packet size validation. An attacker could exploit this vulnerability by sending jumbo frames or frames larger...

CVE-2020-3510

A vulnerability in the Umbrella Connector component of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The vulnerability is due to insufficient erro...

Design/Logic Flaw

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device. The vulnerability is due to insufficient packet size validation. An attacker could exploit this vulnerability by sending jumbo frames or frames larger...

CVE-2020-3510 Cisco IOS XE Software for Catalyst 9200 Series Switches Umbrella Connector Denial of Service Vulnerability

A vulnerability in the Umbrella Connector component of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The vulnerability is due to insufficient erro...

CVE-2020-3527 Cisco Catalyst 9200 Series Switches Jumbo Frame Denial of Service Vulnerability

A vulnerability in the Polaris kernel of Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to crash the device. The vulnerability is due to insufficient packet size validation. An attacker could exploit this vulnerability by sending jumbo frames or frames larger...

CVE-2020-3527

CVE-2020-3527 affects Cisco Catalyst 9200 Series Switches (Polaris kernel). The vulnerability arises from insufficient packet-size validation, allowing an unauthenticated, remote attacker to crash the device by sending jumbo frames or frames larger than the configured MTU to the management interf...