CVE-2026-76464 - Vulnerability Details

- Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco networking engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.

The vulnerabilities tracked by this CVE-2026-76464 are related to buffer management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-119.

Published: 2026-10-07

Score: 9.6 Critical

EPSS: < 1% Very Low

KEV: No

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Campus Gateway Software

unknown

Version	Status	Constraints
`CG 33.1.3`	affected	—

Cisco

Cisco Meraki MR Wireless Access Points Software

unknown

Version	Status	Constraints
`MR 33.1.2`	affected	—
`MR 30.6`	affected	—
`MR 32.1.7`	affected	—
`MR 32.2.3`	affected	—
`MR 32.2.4`	affected	—
`MR 33.1.1`	affected	—

Cisco

Cisco Meraki MV Firmware

unknown

Version	Status	Constraints
`4.20`	affected	—
`5.0`	affected	—
`5.1`	affected	—
`5.2`	affected	—
`5.3`	affected	—
`5.4`	affected	—
`5.4.1`	affected	—
`5.5`	affected	—
`5.5.1`	affected	—
`5.6`	affected	—
`5.6.1`	affected	—
`6.0`	affected	—
`6.0.1`	affected	—
`5.6.2`	affected	—
`6.0.2`	affected	—
`6.1`	affected	—
`6.1.1`	affected	—
`6.1.2`	affected	—
`6.2`	affected	—
`6.2.1`	affected	—
`6.2.2`	affected	—
`6.3`	affected	—
`6.3.2`	affected	—
`2.0`	affected	—
`2.1`	affected	—
`2.2`	affected	—
`3.0`	affected	—
`3.1`	affected	—
`3.2`	affected	—
`3.3`	affected	—
`3.4`	affected	—
`3.5`	affected	—
`3.6`	affected	—
`3.7`	affected	—
`3.8`	affected	—
`3.9`	affected	—
`3.10`	affected	—
`3.11`	affected	—
`3.12`	affected	—
`3.13`	affected	—
`3.14`	affected	—
`3.15`	affected	—
`3.16`	affected	—
`3.17`	affected	—
`3.18`	affected	—
`3.19`	affected	—
`3.20`	affected	—
`3.21`	affected	—
`3.22`	affected	—
`3.23`	affected	—
`3.24`	affected	—
`3.25`	affected	—
`3.26`	affected	—
`3.27`	affected	—
`3.28`	affected	—
`3.29`	affected	—
`3.30`	affected	—
`3.31`	affected	—
`3.32`	affected	—
`3.33`	affected	—
`3.34`	affected	—
`3.35`	affected	—
`3.36`	affected	—
`4.0`	affected	—
`4.1`	affected	—
`4.2`	affected	—
`4.3`	affected	—
`4.4`	affected	—
`4.5`	affected	—
`4.6`	affected	—
`4.7`	affected	—
`4.8`	affected	—
`4.9`	affected	—
`4.10`	affected	—
`4.11`	affected	—
`4.12`	affected	—
`4.13`	affected	—
`4.14`	affected	—
`4.15`	affected	—
`4.16`	affected	—
`4.17`	affected	—
`4.18`	affected	—
`4.18.1`	affected	—
`4.19`	affected	—
`MV 7.3`	affected	—
`MV 7.3.1`	affected	—
`MV 7.3.2`	affected	—
`MV 7.2.1`	affected	—
`MV 7.2.2`	affected	—

Cisco

Cisco Meraki MX Firmware

unknown

Version	Status	Constraints
`16.2`	affected	—
`16.3`	affected	—
`16.4`	affected	—
`16.5`	affected	—
`16.6`	affected	—
`17.3`	affected	—
`17.6`	affected	—
`17.7`	affected	—
`17.8`	affected	—
`17.9`	affected	—
`17.10`	affected	—
`18.1`	affected	—
`18.2`	affected	—
`19.1`	affected	—
`MX 18.211.2`	affected	—
`MX 26.2.1`	affected	—
`MX 19.2.8`	affected	—
`MX 26.2.2`	affected	—
`MX 26.1.4`	affected	—
`MX 26.1.5`	affected	—
`MX 26.1.6`	affected	—

No data.

Vendor Product Confidence Versions

Cisco

Campus Gateway Software

100%

Version	Status	Scheme	Platform
`CG 33.1.3`	affected	generic	—

Cisco

Meraki Mr Wireless Access Point Software

100%

Version	Status	Scheme	Platform
`MR 33.1.2`	affected	generic	—
`MR 30.6`	affected	generic	—
`MR 32.1.7`	affected	generic	—
`MR 32.2.3`	affected	generic	—
`MR 32.2.4`	affected	generic	—
`MR 33.1.1`	affected	generic	—

Cisco

Meraki Mv Firmware

100%

Version	Status	Scheme	Platform
`4.20`	affected	generic	—
`5.0`	affected	generic	—
`5.1`	affected	generic	—
`5.2`	affected	generic	—
`5.3`	affected	generic	—
`5.4`	affected	generic	—
`5.4.1`	affected	generic	—
`5.5`	affected	generic	—
`5.5.1`	affected	generic	—
`5.6`	affected	generic	—
`5.6.1`	affected	generic	—
`6.0`	affected	generic	—
`6.0.1`	affected	generic	—
`5.6.2`	affected	generic	—
`6.1`	affected	generic	—
`6.1.1`	affected	generic	—
`6.1.2`	affected	generic	—
`6.2`	affected	generic	—
`6.2.1`	affected	generic	—
`6.2.2`	affected	generic	—
`6.3`	affected	generic	—
`6.3.2`	affected	generic	—
`2.0`	affected	generic	—
`2.1`	affected	generic	—
`2.2`	affected	generic	—
`3.0`	affected	generic	—
`3.1`	affected	generic	—
`3.2`	affected	generic	—
`3.3`	affected	generic	—
`3.4`	affected	generic	—
`3.5`	affected	generic	—
`3.6`	affected	generic	—
`3.7`	affected	generic	—
`3.8`	affected	generic	—
`3.9`	affected	generic	—
`3.10`	affected	generic	—
`3.11`	affected	generic	—
`3.12`	affected	generic	—
`3.13`	affected	generic	—
`3.14`	affected	generic	—
`3.15`	affected	generic	—
`3.16`	affected	generic	—
`3.17`	affected	generic	—
`3.18`	affected	generic	—
`3.19`	affected	generic	—
`3.20`	affected	generic	—
`3.21`	affected	generic	—
`3.22`	affected	generic	—
`3.23`	affected	generic	—
`3.24`	affected	generic	—
`3.25`	affected	generic	—
`3.26`	affected	generic	—
`3.27`	affected	generic	—
`3.28`	affected	generic	—
`3.29`	affected	generic	—
`3.30`	affected	generic	—
`3.31`	affected	generic	—
`3.32`	affected	generic	—
`3.33`	affected	generic	—
`3.34`	affected	generic	—
`3.35`	affected	generic	—
`3.36`	affected	generic	—
`4.0`	affected	generic	—
`4.1`	affected	generic	—
`4.2`	affected	generic	—
`4.3`	affected	generic	—
`4.4`	affected	generic	—
`4.5`	affected	generic	—
`4.6`	affected	generic	—
`4.7`	affected	generic	—
`4.8`	affected	generic	—
`4.9`	affected	generic	—
`4.10`	affected	generic	—
`4.11`	affected	generic	—
`4.12`	affected	generic	—
`4.13`	affected	generic	—
`4.14`	affected	generic	—
`4.15`	affected	generic	—
`4.16`	affected	generic	—
`4.17`	affected	generic	—
`4.18`	affected	generic	—
`4.18.1`	affected	generic	—
`4.19`	affected	generic	—
`MV 7.3`	affected	generic	—
`MV 7.3.1`	affected	generic	—
`MV 7.3.2`	affected	generic	—
`MV 7.2.1`	affected	generic	—
`MV 7.2.2`	affected	generic	—

Cisco

Meraki Mx Firmware

89%

Version	Status	Scheme	Platform
`16.2`	affected	generic	—
`16.3`	affected	generic	—
`16.4`	affected	generic	—
`16.5`	affected	generic	—
`16.6`	affected	generic	—
`17.3`	affected	generic	—
`17.6`	affected	generic	—
`17.7`	affected	generic	—
`17.8`	affected	generic	—
`17.9`	affected	generic	—
`17.10`	affected	generic	—
`18.1`	affected	generic	—
`18.2`	affected	generic	—
`19.1`	affected	generic	—
`MX 18.211.2`	affected	generic	—
`MX 26.2.1`	affected	generic	—
`MX 19.2.8`	affected	generic	—
`MX 26.2.2`	affected	generic	—
`MX 26.1.4`	affected	generic	—
`MX 26.1.5`	affected	generic	—
`MX 26.1.6`	affected	generic	—

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00192.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-meraki-os-drbEX9GH

History

Fri, 09 Oct 2026 09:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco campus Gateway Software Cisco meraki Mr Wireless Access Point Software Cisco meraki Mv Firmware Cisco meraki Mx Firmware
Vendors & Products		Cisco Cisco campus Gateway Software Cisco meraki Mr Wireless Access Point Software Cisco meraki Mv Firmware Cisco meraki Mx Firmware

Wed, 07 Oct 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 07 Oct 2026 16:30:00 +0000

Type	Values Removed	Values Added
Description		As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco networking engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by this CVE-2026-76464 are related to buffer management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-119.
Title		Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities
Weaknesses		CWE-119
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-meraki-os-drbEX9GH
Metrics		cvssV3_1 `{'score': 9.6, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}`

Subscriptions

Cisco Campus Gateway Software Meraki Mr Wireless Access Point Software Meraki Mv Firmware Meraki Mx Firmware

MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2026-10-07T16:18:42.243Z

Updated: 2026-10-07T18:05:14.042Z

Reserved: 2026-08-19T12:02:03.637Z

Link: CVE-2026-76464

Vulnrichment

Updated: 2026-10-07T18:01:55.358Z

NVD

Status : Awaiting Analysis

Published: 2026-10-07T17:16:59.053

Modified: 2026-10-08T20:08:45.857

Link: CVE-2026-76464

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-09T08:15:09Z

Weaknesses

CWE-119

Tracking

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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