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    <lastBuildDate>Wed, 07 Oct 2026 09:41:57 +0000</lastBuildDate>
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      <title>CVE-2026-20048 — Cisco NX-OS Software SNMP Denial of Service Vulnerability</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-20048</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Cisco NX-OS System Software in ACI Mode&lt;/p&gt;
&lt;p&gt;A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.&#13;
&#13;
This vulnerability is due to improper processing when parsing SNMP requests. An attacker could exploit this vulnerability by continuously sending SNMP queries&amp;amp;nbsp;to a specific MIB of an affected device. A successful exploit could allow the attacker to cause a kernel panic on the device, resulting in a reload and a&amp;amp;nbsp;DoS condition.&#13;
Note: This vulnerability affects SNMP versions 1, 2c, and 3. To exploit&amp;amp;nbsp;this vulnerability through SNMPv1 or&amp;amp;nbsp;SNMPv2c, the attacker must have a valid 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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Cisco NX-OS System Software in ACI Mode&lt;/p&gt;
&lt;p&gt;A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.&#13;
&#13;
This vulnerability is due to improper processing when parsing SNMP requests. An attacker could exploit this vulnerability by continuously sending SNMP queries&amp;amp;nbsp;to a specific MIB of an affected device. A successful exploit could allow the attacker to cause a kernel panic on the device, resulting in a reload and a&amp;amp;nbsp;DoS condition.&#13;
Note: This vulnerability affects SNMP versions 1, 2c, and 3. To exploit&amp;amp;nbsp;this vulnerability through SNMPv1 or&amp;amp;nbsp;SNMPv2c, the attacker must have a valid 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.&lt;/p&gt;</content:encoded>
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