The dormakaba Saflok system, widely used in hospitality and commercial properties, suffers from a cryptographic vulnerability identified as CVE-2024-29916. The root cause is the key derivation function's reliance solely on the UID (unique identifier) of a keycard, which is insufficiently secure. This design flaw allows an attacker who has obtained at least one active or expired keycard tied to a specific property to generate forged keycards capable of unlocking any door within that property. The affected product lines include Saflok MT, Confidant, Quantum, RT, and Saffire series electronic locks. The vulnerability does not require authentication but does require the attacker to have physical access to a valid or expired keycard, which can be obtained through theft, loss, or social engineering. The attack vector involves cloning or forging keycards by exploiting the weak key derivation process. The vulnerability was addressed in a software update released in November 2023, which presumably strengthens the key derivation mechanism or adds additional cryptographic safeguards. The CVSS v3.1 score is 5.6 (medium), reflecting the partial complexity of exploitation (physical access needed) and the significant impact on confidentiality and integrity, as unauthorized door access compromises physical security. No known exploits have been reported in the wild yet, but the potential for misuse in hospitality, corporate, and residential environments is substantial.

The primary impact of CVE-2024-29916 is unauthorized physical access to secured areas, which can lead to theft, privacy violations, property damage, and potential harm to individuals. For organizations worldwide, especially those in the hospitality industry, commercial real estate, and residential complexes using dormakaba Saflok locks, this vulnerability undermines trust in physical security controls. Attackers can bypass door locks without detection if they can clone keycards, potentially gaining access to sensitive areas such as guest rooms, offices, or restricted facilities. This can result in loss of customer confidence, legal liabilities, and financial losses. Additionally, the breach of physical security can facilitate further cyber or physical attacks, such as data theft or sabotage. The medium CVSS score reflects that while exploitation requires some effort and physical access, the consequences of a successful attack are severe in terms of confidentiality and integrity of physical premises.

Organizations should immediately verify that all dormakaba Saflok systems have been updated with the November 2023 software patch that addresses this vulnerability. If the update has not been applied, prioritize its deployment across all affected devices. Additionally, implement strict keycard management policies to reduce the risk of keycard loss or theft, including regular audits and rapid deactivation of lost or expired cards. Consider supplementing electronic locks with additional physical security measures such as surveillance cameras, security personnel, or secondary authentication methods (e.g., PIN codes or biometric verification) where feasible. Educate staff and residents about the risks of keycard sharing and the importance of reporting lost cards promptly. For high-security environments, evaluate alternative locking systems with stronger cryptographic protections. Regularly monitor access logs for suspicious activity that might indicate attempted unauthorized access. Finally, maintain close communication with dormakaba for any further security advisories or updates.