What is CVE-2026-76485?
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.
The record classifies CVE-2026-76485 under weakness class CWE-121. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 3 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 0.5% probability of exploitation in the next 30 days, higher than 41.6% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 6.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-10-07, last modified 2026-10-08
Is CVE-2026-76485 being exploited?
It currently carries a trending score of 50 in the Threadlinqs vulnerability feed.
Affected products and versions
- Cisco: NX-OS Software
How to fix CVE-2026-76485
No vendor patch reference has been recorded for CVE-2026-76485 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-76485
3 tracked threats in the Threadlinqs corpus reference CVE-2026-76485, either in the campaign’s CVE list or as an indicator on the campaign record.
- Critical Cisco Nexus 3000/9000 NX-OS NGOAM Stack Buffer Overflows Allow Unauthenticated Root Code Execution (CVE-2026-76485, CVE-2026-76486, CVE-2026-76501) — CRITICAL · 2026-10-10
- Cisco Nexus 3000/9000 NX-OS and Cisco License (Smart Software Manager On-Prem) critical flaws enabling switch takeover (CVE-2026-76471, CVE-2026-76480, CVE-2026-76482 and others) — CRITICAL · 2026-10-09
- Cisco October 2026 Security Advisories: Critical Flaws in Meraki, License (SSM) On-Prem, NX-OS, APIC and Finesse (CVE-2026-76464, CVE-2026-20328, CVE-2026-76485 and others) — CRITICAL · 2026-10-09
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .