Quick answers
- Is CVE-2026-77708 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77708 being exploited in the wild.
- How severe is CVE-2026-77708?
- Informational severity, published 6 November 2026.
- Which products and versions are affected?
- SonicWall SonicOS.
- Is there a fix for CVE-2026-77708?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-77708 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-77708?
- Check whether you run SonicWall SonicOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A pre-authentication stack-based buffer overflow exists in the SonicOS TACACS+ authentication client component. The vulnerability can be triggered remotely without authentication under specific conditions, allowing an attacker to cause an application-level denial of service. This is a memory safety issue in the authentication subsystem.
Affected products
- SonicWall SonicOS
Timeline
- 2026-11-06: disclosed