VDB

CVE-2026-77709

CVE-2026-77709 PUBLISHED CVSS 5.9 MEDIUM

Reported by sonicwall · Published November 6, 2026

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.

Risk scores

CVSS 3.1
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

VendorProductVersions
SonicWallSonicOS7.3.3-7015 and older versions, 8.2.2-8015 and older versions
SonicWallSonicOS7.3.3-7015, 8.2.2-8015

Timeline

  • Nov 6, 2026 Coalition ESS Score
  • Nov 6, 2026 CVE Published
  • Nov 6, 2026 CVE Updated
  • Nov 7, 2026 EPSS Score (2 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-77709
vulnetix vdb fixes CVE-2026-77709

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-77709/fixes/registry"

The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart

References

  • vendor-advisory
Look up in the Resolve Platform →
$ Lookup Community · 50/day Open Lookup ›