CVE-2026-76464
Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities
No known exploitation. EPSS puts it in the 8th percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
- Cisco Campus Gateway SoftwareAffected: CG 33.1.3Upgrade to: not statedStated by: CVE record
- Cisco Meraki MR Wireless Access Points SoftwareAffected: MR 33.1.2Upgrade to: not statedAffected: MR 30.6Upgrade to: not statedAffected: MR 32.1.7Upgrade to: not statedAffected: MR 32.2.3Upgrade to: not stated + 2 more branchesStated by: CVE record
- Cisco Meraki MV FirmwareAffected: 4.20Upgrade to: not statedAffected: 5.0Upgrade to: not statedAffected: 5.1Upgrade to: not statedAffected: 5.2Upgrade to: not stated + 85 more branchesStated by: CVE record
- Cisco Meraki MX FirmwareAffected: 16.2Upgrade to: not statedAffected: 16.3Upgrade to: not statedAffected: 16.4Upgrade to: not statedAffected: 16.5Upgrade to: not stated + 17 more branchesStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 8th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
5 events over 1 day, from the signal feeds we watch.
- Record updated
- Publishedweakness classified, att&ck mapped, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Scored 9.6 by NVD.
How it is reached
- Attack Vector AdjacentRequires access to the local network (e.g. same Wi-Fi, Bluetooth)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
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