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 ↗

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

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

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