Cisco discloses high-severity Meraki and NX-OS vulnerabilities from internal tests

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Cisco published an advisory on October 7, 2026, detailing multiple vulnerabilities internally discovered in its Meraki and NX-OS products. The advisory groups seven security weaknesses, with the most severe being CVE-2026-76464, a memory-buffer flaw with a CVSS score of 9.6. These vulnerabilities affect products including Meraki gateways, switches, cameras, and wireless access points, requiring an attacker to have adjacent network access. Cisco states no workarounds exist and recommends applying the provided fixed software releases, which address all grouped issues. The company's PSIRT is not aware of any public exploitation of these vulnerabilities.

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