Critical
Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities
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.
Announced Source revision 1
Original source ↗CVE-2026-76464
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-76464
Cisco Campus Gateway Software
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Cisco Meraki MR Wireless Access Points Software
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Cisco Meraki MV Firmware
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Cisco Meraki MX Firmware
Source reference: /containers/cna/affected/3/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Cisco",
"product": "Cisco Campus Gateway Software",
"versions": [
{
"status": "affected",
"version": "CG 33.1.3"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Cisco",
"product": "Cisco Meraki MR Wireless Access Points Software",
"versions": [
{
"status": "affected",
"version": "MR 33.1.2"
},
{
"status": "affected",
"version": "MR 30.6"
},
{
"status": "affected",
"version": "MR 32.1.7"
},
{
"status": "affected",
"version": "MR 32.2.3"
},
{
"status": "affected",
"version": "MR 32.2.4"
},
{
"status": "affected",
"version": "MR 33.1.1"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Cisco",
"product": "Cisco Meraki MV Firmware",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "affected",
"version": "5.0"
},
{
"status": "affected",
"version": "5.1"
},
{
"status": "affected",
"version": "5.2"
},
{
"status": "affected",
"version": "5.3"
},
{
"status": "affected",
"version": "5.4"
},
{
"status": "affected",
"version": "5.4.1"
},
{
"status": "affected",
"version": "5.5"
},
{
"status": "affected",
"version": "5.5.1"
},
{
"status": "affected",
"version": "5.6"
},
{
"status": "affected",
"version": "5.6.1"
},
{
"status": "affected",
"version": "6.0"
},
{
"status": "affected",
"version": "6.0.1"
},
{
"status": "affected",
"version": "5.6.2"
},
{
"status": "affected",
"version": "6.0.2"
},
{
"status": "affected",
"version": "6.1"
},
{
"status": "affected",
"version": "6.1.1"
},
{
"status": "affected",
"version": "6.1.2"
},
{
"status": "affected",
"version": "6.2"
},
{
"status": "affected",
"version": "6.2.1"
},
{
"status": "affected",
"version": "6.2.2"
},
{
"status": "affected",
"version": "6.3"
},
{
"status": "affected",
"version": "6.3.2"
},
{
"status": "affected",
"version": "2.0"
},
{
"status": "affected",
"version": "2.1"
},
{
"status": "affected",
"version": "2.2"
},
{
"status": "affected",
"version": "3.0"
},
{
"status": "affected",
"version": "3.1"
},
{
"status": "affected",
"version": "3.2"
},
{
"status": "affected",
"version": "3.3"
},
{
"status": "affected",
"version": "3.4"
},
{
"status": "affected",
"version": "3.5"
},
{
"status": "affected",
"version": "3.6"
},
{
"status": "affected",
"version": "3.7"
},
{
"status": "affected",
"version": "3.8"
},
{
"status": "affected",
"version": "3.9"
},
{
"status": "affected",
"version": "3.10"
},
{
"status": "affected",
"version": "3.11"
},
{
"status": "affected",
"version": "3.12"
},
{
"status": "affected",
"version": "3.13"
},
{
"status": "affected",
"version": "3.14"
},
{
"status": "affected",
"version": "3.15"
},
{
"status": "affected",
"version": "3.16"
},
{
"status": "affected",
"version": "3.17"
},
{
"status": "affected",
"version": "3.18"
},
{
"status": "affected",
"version": "3.19"
},
{
"status": "affected",
"version": "3.20"
},
{
"status": "affected",
"version": "3.21"
},
{
"status": "affected",
"version": "3.22"
},
{
"status": "affected",
"version": "3.23"
},
{
"status": "affected",
"version": "3.24"
},
{
"status": "affected",
"version": "3.25"
},
{
"status": "affected",
"version": "3.26"
},
{
"status": "affected",
"version": "3.27"
},
{
"status": "affected",
"version": "3.28"
},
{
"status": "affected",
"version": "3.29"
},
{
"status": "affected",
"version": "3.30"
},
{
"status": "affected",
"version": "3.31"
},
{
"status": "affected",
"version": "3.32"
},
{
"status": "affected",
"version": "3.33"
},
{
"status": "affected",
"version": "3.34"
},
{
"status": "affected",
"version": "3.35"
},
{
"status": "affected",
"version": "3.36"
},
{
"status": "affected",
"version": "4.0"
},
{
"status": "affected",
"version": "4.1"
},
{
"status": "affected",
"version": "4.2"
},
{
"status": "affected",
"version": "4.3"
},
{
"status": "affected",
"version": "4.4"
},
{
"status": "affected",
"version": "4.5"
},
{
"status": "affected",
"version": "4.6"
},
{
"status": "affected",
"version": "4.7"
},
{
"status": "affected",
"version": "4.8"
},
{
"status": "affected",
"version": "4.9"
},
{
"status": "affected",
"version": "4.10"
},
{
"status": "affected",
"version": "4.11"
},
{
"status": "affected",
"version": "4.12"
},
{
"status": "affected",
"version": "4.13"
},
{
"status": "affected",
"version": "4.14"
},
{
"status": "affected",
"version": "4.15"
},
{
"status": "affected",
"version": "4.16"
},
{
"status": "affected",
"version": "4.17"
},
{
"status": "affected",
"version": "4.18"
},
{
"status": "affected",
"version": "4.18.1"
},
{
"status": "affected",
"version": "4.19"
},
{
"status": "affected",
"version": "MV 7.3"
},
{
"status": "affected",
"version": "MV 7.3.1"
},
{
"status": "affected",
"version": "MV 7.3.2"
},
{
"status": "affected",
"version": "MV 7.2.1"
},
{
"status": "affected",
"version": "MV 7.2.2"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Cisco",
"product": "Cisco Meraki MX Firmware",
"versions": [
{
"status": "affected",
"version": "16.2"
},
{
"status": "affected",
"version": "16.3"
},
{
"status": "affected",
"version": "16.4"
},
{
"status": "affected",
"version": "16.5"
},
{
"status": "affected",
"version": "16.6"
},
{
"status": "affected",
"version": "17.3"
},
{
"status": "affected",
"version": "17.6"
},
{
"status": "affected",
"version": "17.7"
},
{
"status": "affected",
"version": "17.8"
},
{
"status": "affected",
"version": "17.9"
},
{
"status": "affected",
"version": "17.10"
},
{
"status": "affected",
"version": "18.1"
},
{
"status": "affected",
"version": "18.2"
},
{
"status": "affected",
"version": "19.1"
},
{
"status": "affected",
"version": "MX 18.211.2"
},
{
"status": "affected",
"version": "MX 26.2.1"
},
{
"status": "affected",
"version": "MX 19.2.8"
},
{
"status": "affected",
"version": "MX 26.2.2"
},
{
"status": "affected",
"version": "MX 26.1.4"
},
{
"status": "affected",
"version": "MX 26.1.5"
},
{
"status": "affected",
"version": "MX 26.1.6"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-76464
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #32298 · Revision 1
- Added to Heist Feed
- Publisher date