CVE-2026-43837

7.5High

Published 20 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash

7.5High

Attack vector: Network
Complexity: High
Privileges needed: High
User interaction: None
Impact: Full C/I/A compromise
Weakness: —

Impact

Attackers with guest-level credentials can execute arbitrary code on the affected system. They need network access to the service and a valid guest account.

Root cause

A buffer overflow occurs during password verification.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v4.0 · CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Fix & remediation

Check the Advantech security advisory for the target firmware/software update, and disable or restrict guest accounts until patched.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

A buffer overflow vulnerability in the password verification functionality could allow an attacker with guest authentication to achieve code execution.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-43837