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    CVE-2026-104381

    A missing authentication vulnerability in Fireware OS's FireCluster state synchronization feature allows an unauthenticated attacker positioned on the cluster synchronization network segment to force premature VPN tunnel termination by sending crafted cluster synchronization traffic.

    Published:Oct 27, 2026
    Last Modified:Oct 27, 2026
    EPS:Oct 27, 2026
    EPSS Score:
    CVSS Score:6

    Affected Products

    Vendor
    Watchguard
    Product
    Fireware Os

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-102 Session Sidejacking
    CAPEC-111 JSON Hijacking (aka JavaScript Hijacking)
    CAPEC-12 Choosing Message Identifier
    CAPEC-141 Cache Poisoning
    CAPEC-142 DNS Cache Poisoning
    CAPEC-148 Content Spoofing
    CAPEC-166 Force the System to Reset Values
    CAPEC-216 Communication Channel Manipulation
    CAPEC-218 Spoofing of UDDI/ebXML Messages
    CAPEC-36 Using Unpublished Interfaces or Functionality
    CAPEC-384 Application API Message Manipulation via Man-in-the-Middle
    CAPEC-385 Transaction or Event Tampering via Application API Manipulation
    CAPEC-386 Application API Navigation Remapping
    CAPEC-387 Navigation Remapping To Propagate Malicious Content
    CAPEC-388 Application API Button Hijacking
    CAPEC-509 Kerberoasting
    CAPEC-555 Remote Services with Stolen Credentials
    CAPEC-561 Windows Admin Shares with Stolen Credentials
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-62 Cross Site Request Forgery
    CAPEC-644 Use of Captured Hashes (Pass The Hash)
    CAPEC-645 Use of Captured Tickets (Pass The Ticket)
    CAPEC-652 Use of Known Kerberos Credentials
    CAPEC-665 Exploitation of Thunderbolt Protection Flaws
    CAPEC-701 Browser in the Middle (BiTM)
    CAPEC-94 Adversary in the Middle (AiTM)

    Related CVEs

    CVE-2026-90465 (CVSS 9.4) — A missing authentication vulnerability in the FireCluster Sync processing allows an attacker positioned on the…
    CVE-2026-93862 (CVSS 7.2) — An out-of-bounds read vulnerability in the FireCluster Sync processing allows an attacker positioned on the cl…
    CVE-2026-112709 (CVSS 9.2) — A heap-based buffer overflow vulnerability in the Fireware OS authentication service allows an attacker who co…
    CVE-2026-90464 (CVSS 7.2) — An external control of file path vulnerability in a WatchGuard Fireware OS firewall diagnostic command allows …
    CVE-2026-103593 (CVSS 7.1) — A stack-based buffer overflow vulnerability in the Fireware OS logging service allows a network-adjacent attac…
    CVE-2026-113881 (CVSS 6.1) — A stack-based buffer overflow vulnerability in Fireware OS's VPN Network Access Enforcement process allows an …
    CVE-2026-93434 (CVSS 8.7) — An XPath injection vulnerability in WatchGuard Fireware OS's SSH authentication process allows a remote, unaut…
    CVE-2026-90442 (CVSS 8.6) — A stack-based buffer overflow vulnerability in the Fireware OS certd process allows an authenticated attacker …
    CVE-2026-112710 (CVSS 9.2) — A heap-based buffer overflow vulnerability exists in the Fireware OS authentication service allows an attacker…
    CVE-2026-82332 (CVSS 5.7) — An improper authentication vulnerability in WatchGuard Fireware OS's AuthPoint multi-factor authentication pro…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High