TI-2026-16229 Aliases CVE-2026-20010 GHSA-8f59-hcpc-g3hp

Cisco Nexus 3000 and 9000 Series Switches Link Layer Discovery Protocol Denial of Service Vulnerability

LOW 32CWE-805Published 2026-02-25 · Updated 2026-02-25

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly. This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. Note: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00186 8th 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 Software	10.3(1); 10.3(2); 10.3(3); 10.4(1); 10.3(99w); 10.3(3w); 10.3(99x); 10.3(3o); 10.3(4); 10.3(3p); 10.3(4a); 10.4(2); 10.3(3q); 10.3(3x); 10.3(4g); 10.3(3r); 10.3(4h)	—	No fix listed	CNA
Cisco	Cisco NX-OS System Software in ACI Mode	16.0(2h); 16.0(2j); 16.0(3d); 16.0(3e); 16.0(4c); 16.0(5h); 16.0(3g); 16.0(5j); 16.0(6c); 16.1(1f); 16.0(7e); 16.0(8e); 16.0(8f); 16.1(2f); 16.1(2g); 16.0(9c); 16.1(3f); 16.0(9d); 16.0(6h); 16.0(8h); 16.1(3g)	—	No fix listed	CNA
Cisco	Cisco Unified Computing System (Managed)	4.3(4e); 4.3(6b); 4.3(4c); 4.3(4f); 4.3(6d); 4.3(5e); 4.3(4d); 4.3(4b); 4.3(5a); 4.3(5c); 4.3(5d); 4.3(6c); 4.3(6a)	—	No fix listed	CNA

Cisco NX-OS Software VendorCisco Affected 10.3(1); 10.3(2); 10.3(3); 10.4(1); 10.3(99w); 10.3(3w); 10.3(99x); 10.3(3o); 10.3(4); 10.3(3p); 10.3(4a); 10.4(2); 10.3(3q); 10.3(3x); 10.3(4g); 10.3(3r); 10.3(4h) Fixed in — No fix listed CNA
Cisco NX-OS System Software in ACI Mode VendorCisco Affected 16.0(2h); 16.0(2j); 16.0(3d); 16.0(3e); 16.0(4c); 16.0(5h); 16.0(3g); 16.0(5j); 16.0(6c); 16.1(1f); 16.0(7e); 16.0(8e); 16.0(8f); 16.1(2f); 16.1(2g); 16.0(9c); 16.1(3f); 16.0(9d); 16.0(6h); 16.0(8h); 16.1(3g) Fixed in — No fix listed CNA
Cisco Unified Computing System (Managed) VendorCisco Affected 4.3(4e); 4.3(6b); 4.3(4c); 4.3(4f); 4.3(6d); 4.3(5e); 4.3(4d); 4.3(4b); 4.3(5a); 4.3(5c); 4.3(5d); 4.3(6c); 4.3(6a) 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-2026-20010
2026-10-03 Alias added: GHSA-8f59-hcpc-g3hp

References

Other 1

cisco-sa-n3kn9k_aci_lldp_dos-NdgRrrA3

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TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

See all 7059 →

Sources

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