---
title: "CVE-2026-76464: Cisco Networking - Buffer Overflow"
description: "Cisco networking products contain buffer overflow vulnerabilities caused by improper buffer management, letting attackers potentially cause denial of service or execute arbitrary code, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-76464/
---

# CVE-2026-76464 Cisco Networking - Buffer Overflow

Cisco networking products contain buffer overflow vulnerabilities caused by improper buffer management, letting attackers potentially cause denial of service or execute arbitrary code, exploit requires network access.

CVSS base score 9.6 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.19% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-76464)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-119](https://cwe.mitre.org/data/definitions/119.html)

## Vendor fix

Update to the latest Cisco software hardening release addressing these vulnerabilities.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-76464](https://nvd.nist.gov/vuln/detail/CVE-2026-76464)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-meraki-os-drbEX9GH](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-meraki-os-drbEX9GH)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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