TI-2026-16262 Aliases CVE-2026-20048 GHSA-c9vx-x9q2-ffx8

Cisco NX-OS Software SNMP Denial of Service Vulnerability

LOW 34CWE-789Published 2026-02-25 · Updated 2026-02-25

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-789.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00344 28th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco NX-OS System Software in ACI Mode	15.2(1g); 15.2(2e); 15.2(2f); 15.2(2g); 15.2(2h); 15.2(3f); 15.2(3e); 15.2(3g); 15.2(4d); 15.2(4e); 15.2(5c); 15.2(5d); 16.0(1g); 15.2(5e); 15.2(4f); 15.2(6e); 15.2(6h); 16.0(1j); 15.2(6g); 15.2(7f); 15.2(7g); 16.0(2h); 15.2(8d); 16.0(2j); 15.2(8e); 16.0(3d); 16.0(3e); 15.2(8f); 15.2(8g); 15.3(1d); 15.2(8h); 16.0(4c); 15.3(2a); 15.2(8i); 16.0(5h); 15.3(2b); 16.0(3g); 16.0(5j); 15.3(2c); 16.0(6c); 15.3(2d); 16.1(1f); 16.0(7e); 16.0(8e); 15.3(2e); 16.0(8f); 16.1(2f); 16.1(2g); 15.3(2f); 16.0(9c); 16.1(3f); 16.0(9d); 16.0(6h); 16.0(8h); 16.1(3g); 16.0(9e); 16.1(4h)	—	No fix listed	CNA

Cisco NX-OS System Software in ACI Mode VendorCisco Affected 15.2(1g); 15.2(2e); 15.2(2f); 15.2(2g); 15.2(2h); 15.2(3f); 15.2(3e); 15.2(3g); 15.2(4d); 15.2(4e); 15.2(5c); 15.2(5d); 16.0(1g); 15.2(5e); 15.2(4f); 15.2(6e); 15.2(6h); 16.0(1j); 15.2(6g); 15.2(7f); 15.2(7g); 16.0(2h); 15.2(8d); 16.0(2j); 15.2(8e); 16.0(3d); 16.0(3e); 15.2(8f); 15.2(8g); 15.3(1d); 15.2(8h); 16.0(4c); 15.3(2a); 15.2(8i); 16.0(5h); 15.3(2b); 16.0(3g); 16.0(5j); 15.3(2c); 16.0(6c); 15.3(2d); 16.1(1f); 16.0(7e); 16.0(8e); 15.3(2e); 16.0(8f); 16.1(2f); 16.1(2g); 15.3(2f); 16.0(9c); 16.1(3f); 16.0(9d); 16.0(6h); 16.0(8h); 16.1(3g); 16.0(9e); 16.1(4h) Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:nx-os::::::::	—	—	Cisco

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-20048
2026-10-03 Alias added: GHSA-c9vx-x9q2-ffx8

References

Other 1

cisco-sa-nxos-dsnmp-cNN39Uh

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences