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CriticalVulnerabilityCVE-2026-112710updated 27 Oct 2026, 19:35 UTC

Firewall login service can crash or be taken over via a malicious directory reply

A flaw in the firewall's login checking can let an attacker who controls or intercepts traffic to the company's Active Directory server crash the firewall or possibly run their own code on it. Attackers would need to sit in the network path

Official, 2 sources
SeverityCriticalCVSS 9.2 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Attacker positionedControls or intercepts traffic to the AD server
  2. 2Crafted AD replyMalicious response sent to the firewall
  3. 3Auth service parses replyHeap buffer overflow in authentication service
  4. 4Firewall impactedCrash, or possible code execution
  5. ResultFirewall crashes or attacker gains control

What happened

A heap-based buffer overflow in the Fireware OS authentication service is triggered by a specially crafted response from the configured Active Directory server, enabling denial of service and potentially arbitrary code execution.

Why it is dangerous: Successful exploitation can take the firewall offline or give an attacker control of it, exposing the network it protects. Organizations using Active Directory authentication on affected firewalls are at risk.

Are you affected?

You are affected if you run Fireware OS with Active Directory authentication configured on the firewall.

Fireware OS (affected versions not specified in the source material)

What to do

  1. Check whether your firewall uses Active Directory authentication and confirm your Fireware OS version
  2. Check the vendor advisory for a fixed Fireware OS version and update as soon as possible
  3. Restrict and monitor traffic between the firewall and the Active Directory server until patched

Timeline

  1. 27 Oct 2026, 16:17 UTC
    Publicly disclosed
  2. 27 Oct 2026, 16:17 UTC
    Reported by NVD · NVD
  3. 27 Oct 2026, 16:20 UTC
    Picked up by Zero Radar
  4. 27 Oct 2026, 19:35 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-112710 · GHSA-hwf3-gg9q-pwrm
CVSS
9.2 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
27 Oct 2026, 16:17 UTC
On Zero Radar
27 Oct 2026, 16:20 UTC (3 min after disclosure)
Last change
27 Oct 2026, 19:35 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Firewall login service can crash or be taken over via a malicious directory reply · Zero Radar