CVE-2026-90823

9.8 CRITICAL

Published 2026-09-17 · Updated 2026-09-18

AI risk analysis

Summary: This flaw is a stack-based buffer overflow in the /usr/sbin/auth_user_pass script, allowing unauthenticated attackers to potentially execute arbitrary code as root via a crafted authentication request.
Exploitability: Exploitation requires access to the management interface, which is disabled by default. Affected appliances must have the management interface enabled for the attack to be possible.
Blast radius: If exploited, the attacker could gain full control over the affected appliance, leading to severe system compromise.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to firmware version 10.1.2r61p100 or later.

rceauth-bypassstack-overflow

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

FatPipe MPVPN, WARP, and IPVPN appliances running the end-of-life firmware version 10.1.2r60p100 contain a stack-based buffer overflow in /usr/sbin/auth_user_pass. An unauthenticated remote attacker with access to the affected management interface can submit a crafted authentication request that reaches an unchecked copy into a fixed-size stack buffer, potentially allowing arbitrary code execution as root. The affected management interface is disabled by default and must be affirmatively enabled by the customer before the endpoint becomes reachable. FatPipe recommends restricting management access to trusted administrative networks and using WAN access control lists to limit access to trusted sources. Customers running the affected end-of-life firmware can contact FatPipe Support for help confirming their firmware version and upgrading to a current supported release at https://www.fatpipeinc.com/support/support, [email protected], or +1 800-724-8521 (option 3).

CVSS vector

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

Weaknesses

CWE-121

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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