Heap-based Buffer Overflow in Fireware OS Authentication Service by WatchGuard
CVE-2026-112710

9.2CRITICAL

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-112710?

The Fireware OS authentication service is vulnerable to a heap-based buffer overflow. This vulnerability can be exploited by an attacker who has the capability to control or intercept communication with the configured Active Directory server. By sending a specially crafted response, the attacker may cause a denial of service condition or potentially execute arbitrary code, resulting in serious security implications for affected systems.

Affected Version(s)

Fireware OS Default 2025.1 < 2026.4

Fireware OS Default 12.0 < 12.12.4

Fireware OS T15/T35 12.0 < 12.5.22

References

https://psirt.watchguard.com/CVE-2026-112710
vendor-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WatchGuard AI Security Research
.