CVE-2026-76471

CRITICAL

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condi...

Affects 0 products across 1 vendor.

CVSS 3.19.8
EPSS0.5%
Percentile43th
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-122: Heap-Based Buffer Overflow

Buffer overflow corrupting dynamically allocated heap memory, exploitable for arbitrary code execution.

Related Attack Patterns (CAPEC)
CAPEC-92 Forced Integer Overflow
via CWE-122

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-76471) affects the target system. A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.  The vulnerabilit...

Is this CVE in your environment?

BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.

Check My Environment →
Frequently Asked Questions
What is CVE-2026-76471?
A critical severity vulnerability (CVE-2026-76471) affects the target system. A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.  The vulnerabilit...
What is the CVSS score for CVE-2026-76471?
CVE-2026-76471 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-2026-76471 actively exploited?
No confirmed active exploitation of CVE-2026-76471 as of 2026-10-11.
How do I remediate CVE-2026-76471?
Apply vendor patches for CVE-2026-76471. Monitor Cisco advisories.
What systems are affected by CVE-2026-76471?
CVE-2026-76471 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-76471
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)
Heap-Based Buffer Overflow
SourceNVD
Official Description

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.  The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a reload of the device and a 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
Related CVEs affecting Cisco
CVE-2026-76482 10.0 As part of Cisco's ongoing commitment to proactive security and product quali... CVE-2009-4912 10.0 Cisco Adaptive Security Appliances (ASA) 5580 series devices with software be... CVE-1999-0775 10.0 Cisco Gigabit Switch routers running IOS allow remote attackers to forward un... CVE-2006-5288 10.0 Cisco 2700 Series Wireless Location Appliances before 2.1.34.0 have a default... CVE-2007-4241 10.0 Buffer overflow in ldcconn in Hewlett-Packard (HP) Controller for Cisco Local...
View all Cisco CVEs →

Critical Severity - Know Your Exposure

A CVSS 9.8 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.

Create a free account →