Vulnerability record/PUBLISHED/Published Nov 6, 2026 19:06:33 UTC

CVE-2026-77709

A pre-authentication heap-based buffer overflow vulnerability has been identified in the SonicOS TACACS+ authentication client, which in specific conditions could potentially enable a remote unauthenticated attacker to cause an application level denial of service.

Base score5.9/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityHighAC

Privileges requiredNonePR

User interactionNoneUI

ScopeUnchangedS

Confidentiality impactNoneC

Integrity impactNoneI

Availability impactHighA

CVSS vector stringCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authoritysonicwall

Last updatedNov 11, 2026 18:16:13 UTC

PublishedNov 6, 2026 19:06:33 UTC

ReservedAug 21, 2026 08:45:58 UTC

Credits

Dan Stefan Alexandru of Pentest-Tools.com