CVE-2026-20185
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
A vulnerability in the SNMP protocol in Cisco 350 and 350X switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The issue is due to improper error handling when parsing response data for a specific SNMP request.
Risk Assessment
An attacker could exploit this vulnerability to unexpectedly reload the device, leading to service availability interruptions. This could impact the operational continuity of the organization and its network infrastructure.
Recommendation
It is recommended to update the firmware of Cisco 350 and 350X switches to the latest version to mitigate this vulnerability. Additionally, access to SNMP should be restricted to trusted users and SNMP traffic should be monitored in the network.
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Original NVD description (English source)
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS