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Cisco IOS XE Software SNMP Denial of Service Vulnerability

medcisco_psirtPublished 2026-08-05

<p>A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.</p> <p>This vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP — Versions 1, 2c, an

MITRE ATT&CK techniques

CredentialsT1589.001

Indicators of compromise

CVE-2026-20124cve

Original source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MD?vs_f=Cisco%20Security%20Advisory%26vs_cat=Security%20Intelligence%26vs_type=RSS%26vs_p=Cisco%20IOS%20XE%20Software%20SNMP%20Denial%20of%20Service%20Vulnerability%26vs_k=1