Critical severity · published Oct 7, 2026
CVE-2026-76464
Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities
9.6
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Cisco Campus Gateway Software · Cisco
CG 33.1.3 · source: vendor
CM
Cisco Meraki MR Wireless Access Points Software · Cisco
MR 33.1.2; MR 30.6; MR 32.1.7; MR 32.2.3; MR 32.2.4; MR 33.1.1 · source: vendor
CM
Cisco Meraki MV Firmware · Cisco
4.20; 5.0; 5.1; 5.2; 5.3; 5.4; +34 more · source: vendor
CM
Cisco Meraki MX Firmware · Cisco
16.2; 16.3; 16.4; 16.5; 16.6; 17.3; +15 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76464
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-76464
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-meraki-os-drbEX9GH
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