GCVE-110-NCSC-2026-277

Advisory PublishedCVSS 9.9/10

Vulnetix · Advisory published August 6, 2026

Cisco's Catalyst SD-WAN engineering teams conducted internal security reviews resulting in software hardening releases that address multiple vulnerabilities, including improper input validation (CVE-2026-20303, CWE-20).

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Weaknesses (CWE)

CWE-1284Improper Validation of Specified Quantity in InputCWE-59Improper Link Resolution Before File Access ('Link Following')CWE-312Cleartext Storage of Sensitive Information

Risk Scores

CVSS 3.1

9.9/10

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

Affected Products

Vendor	Product	Versions	Platforms
Cisco	vers:unknown/*	—	—

Aliases

CVE-2026-20303 CVE-2026-20304 CVE-2026-20310 CVE-2026-20312 CVE-2026-20313

References

advisory

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