CVE-2026-57263 in LOGO! Soft Comfort
Summary
by MITRE • 08/11/2026
A vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). The project password feature in the affected products stores the password as an unsalted SHA-256 hash. This could allow an attacker who has obtained the project file to perform efficient offline dictionary or brute-force attacks against the unsalted hash.
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Analysis
by VulDB Data Team • 08/11/2026
The vulnerability identified in LOGO! Soft Comfort versions prior to V9 represents a critical security flaw that undermines the integrity of the application's authentication mechanism. This weakness specifically affects the project password feature which employs an insecure hashing approach that fails to implement proper salting techniques. The absence of salt in the SHA-256 hash implementation creates a predictable cryptographic environment that significantly weakens the security posture of user credentials stored within project files.
The technical implementation flaw stems from the application's failure to incorporate salt values when generating password hashes, resulting in deterministic hash outputs for identical passwords across different project instances. This cryptographic weakness directly violates established security best practices and aligns with CWE-759, which addresses the use of a one-way hash without a salt. The vulnerability creates an environment where attackers can leverage precomputed rainbow tables or conduct efficient brute-force attacks against the stored hashes, as the lack of entropy from salt values eliminates the primary defense mechanism that would otherwise complicate such attacks.
From an operational perspective, this vulnerability presents substantial risk to users who store sensitive project data within LOGO Soft Comfort is commonly deployed, as compromised credentials could lead to unauthorized access to critical infrastructure configurations.
The security implications extend beyond simple credential theft, as this vulnerability enables potential lateral movement within networked environments where project files might contain additional sensitive information or serve as entry points for broader system compromise. Organizations utilizing LOGO! Soft Comfort in industrial automation contexts face increased risk of operational disruption and data integrity breaches when attackers exploit this weakness to gain unauthorized access to control systems. This vulnerability also aligns with ATT&CK technique T1212, which covers exploitation of software vulnerabilities that allow for credential access.
Mitigation strategies should prioritize immediate implementation of the vendor-provided update to version 9 or later, which addresses the cryptographic weakness through proper salted hash implementation. System administrators should conduct comprehensive inventory assessments to identify all installations running vulnerable versions and implement additional access controls around project file storage and distribution. Organizations should also consider implementing multi-factor authentication mechanisms where possible, though this vulnerability primarily affects password-based authentication within the application itself. The remediation process must include re-encryption of existing project files with properly salted hashes and establishment of security policies that prevent unauthorized access to sensitive project data, particularly in environments where physical or digital access controls may be insufficient.