CVE-2026-76486

CRITICAL

A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary c...

Affects 0 products across 1 vendor.

CVSS 3.19.8
EPSS0.5%
Percentile42th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-121: Stack-Based Buffer Overflow

Buffer overflow corrupting the program stack, typically overwriting the return address for code execution.

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-76486) affects the target system. A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a Denial-of-Service...

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Frequently Asked Questions
What is CVE-2026-76486?
A critical severity vulnerability (CVE-2026-76486) affects the target system. A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a Denial-of-Service...
What is the CVSS score for CVE-2026-76486?
CVE-2026-76486 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.5%.
Is CVE-2026-76486 actively exploited?
No confirmed active exploitation of CVE-2026-76486 as of 2026-10-11.
How do I remediate CVE-2026-76486?
Apply vendor patches for CVE-2026-76486. Monitor Cisco advisories.
What systems are affected by CVE-2026-76486?
CVE-2026-76486 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-76486
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-10-07
Last Modified2026-10-08
ICS Relevance70%
Weakness (CWE)
Stack-Based Buffer Overflow
SourceNVD
Official Description

A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a Denial-of-Service (DoS) on an affected device. This vulnerability is due to improper input validation of IP traffic when the NGOAM feature is enabled. An attacker could exploit this vulnerability by sending crafted packets to an IP interface on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes resulting in a reload and DoS condition.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Cisco — —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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