CVE-2026-111090

Improper Signature Verification of Firmware Update Files

HIGH
7.8
CVSS Score
Published: October 20, 2026 at 07:42 AM UTC
Updated: October 20, 2026 at 07:35 PM UTC
1 product affected across 1 vendorNetwork Security

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A logic error exists in the signature verification routine resulting in acceptance of unauthenticated update and license files.It is necessary to use only the MyStormshield servers to retrieve update files or licenses, or to use automatic verification via SNS.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 4.3.45 QS (unaffected)
Vendor states this is fixed in 4.8.20 LTSB (unaffected)
Vendor states this is fixed in 5.0.10 (unaffected)
Vendor states this is fixed in 5.1.4 EA (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHairbus
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-287

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