7.7

CVE-2026-20048

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.

This vulnerability is due to improper processing when parsing SNMP requests. An attacker could exploit this vulnerability by continuously sending SNMP queries 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 DoS condition.
Note: This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv1 or 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.
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Produkt Cisco NX-OS System Software in ACI Mode
Default Statusunknown
Version 15.2(1g)
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Version 15.2(2e)
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Version 15.2(2f)
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Version 15.2(2g)
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Version 15.2(2h)
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Version 15.2(3f)
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Version 15.2(3e)
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Version 15.2(3g)
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Version 15.2(4d)
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Version 15.2(4e)
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Version 15.2(5c)
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Version 15.2(5d)
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Version 16.0(1g)
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Version 15.2(5e)
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Version 15.2(4f)
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Version 15.2(6e)
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Version 15.2(6h)
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Version 16.0(1j)
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Version 15.2(6g)
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Version 15.2(7f)
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Version 15.2(7g)
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Version 16.0(2h)
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Version 15.2(8d)
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Version 16.0(2j)
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Version 15.2(8e)
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Version 16.0(3d)
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Version 16.0(3e)
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Version 15.2(8f)
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Version 15.2(8g)
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Version 15.3(1d)
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Version 15.2(8h)
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Version 16.0(4c)
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Version 15.3(2a)
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Version 15.2(8i)
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Version 16.0(5h)
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Version 15.3(2b)
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Version 16.0(3g)
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Version 16.0(5j)
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Version 15.3(2c)
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Version 16.0(6c)
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Version 15.3(2d)
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Version 16.1(1f)
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Version 16.0(7e)
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Version 16.0(8e)
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Version 15.3(2e)
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Version 16.0(8f)
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Version 16.1(2f)
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Version 16.1(2g)
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Version 15.3(2f)
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Version 16.0(9c)
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Version 16.1(3f)
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Version 16.0(9d)
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Version 16.0(6h)
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Version 16.0(8h)
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Version 16.1(3g)
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Version 16.0(9e)
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Version 16.1(4h)
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Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.44
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
psirt@cisco.com 7.7 3.1 4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE-789 Memory Allocation with Excessive Size Value

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.