CVE-2026-20185CWE-122

Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability

High · published May 6, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
31.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00389 · 31.8th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-05-06T16:15Z
EPSS history
Timeline
  • 06 MAY 16:15Z
    Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability
    cvelistv5