VulnerabilityPublished 21 Mar 2024Updated 19 Oct 2024

CVE-2024-29916: dormakaba Saflok system · Inefficient Algorithmic Complexity

Source CVE Database V5

Not known to be exploited · CVSS 5.6 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

5.6Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector: Physical
Attack Complexity: High
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Physical: The attack requires the attacker to physically touch or manipulate the vulnerable component. Physical interaction may be brief or persistent.
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 21 Mar 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

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.

Description

The dormakaba Saflok system before the November 2023 software update allows an attacker to unlock arbitrary doors at a property via forged keycards, if the attacker has obtained one active or expired keycard for the specific property, aka the "Unsaflok" issue. This occurs, in part, because the key derivation function relies only on a UID. This affects, for example, Saflok MT, and the Confidant, Quantum, RT, and Saffire series.

Impact

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.

CWE-407Inefficient Algorithmic Complexity (opens in a new tab)
Class weaknessLikelihood of exploit: Low
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 26 Feb 2026, 22:30 UTC

WeaknessesCWE-407

Technical details

References

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