CVE-2026-75112 in OTTO Fleet Manager
Summary
by MITRE • 08/20/2026
A security issue exists within OTTO® Fleet Manager. The vulnerability stems from the use of an insufficient work factor in the bcrypt password hashing implementation, which could reduce the computational cost required for an attacker to perform offline brute-force attacks against stored password hashes. If an attacker gains access to an unencrypted system backup, the weakly hashed credentials could be more easily compromised.
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability identified within OTTO Fleet Manager centers on a cryptographic implementation flaw specifically related to password storage mechanisms. The core issue is the use of an insufficient work factor in the bcrypt algorithm for hashing user passwords. Bcrypt is designed as an adaptive hash function that allows administrators to increase the cost parameter, thereby making brute-force attacks more computationally expensive and time-consuming over time as hardware improves. By employing a lower-than-recommended or static low work factor, the system fails to adequately resist modern offline password cracking techniques. This configuration error effectively reduces the computational barrier required for an attacker to reverse-engineer stored credentials from their hashed representations.
From an operational perspective, this weakness significantly lowers the threshold for credential compromise in scenarios where data confidentiality is breached. If a threat actor gains access to unencrypted system backups or database dumps containing these password hashes, they can employ specialized tools such as Hashcat or John the Ripper to perform offline brute-force attacks with substantially reduced effort compared to what would be required against properly configured bcrypt implementations. The impact extends beyond simple account takeover; compromised administrative credentials could lead to unauthorized control over fleet management operations, potentially disrupting logistics, exposing sensitive customer data, and allowing for further lateral movement within the network infrastructure if those credentials are reused across other systems.
This vulnerability aligns with CWE-916, which describes the use of a weak hash function for passwords, specifically highlighting cases where parameters like work factor or salt length do not meet current security standards. In terms of adversary behavior mapping under the MITRE ATT&CK framework, this flaw facilitates T1110, Brute Force attacks, by lowering the resource cost associated with credential guessing. It also relates to T1552, Unsecured Credentials, as it involves the improper storage and protection of authentication data. The risk is particularly acute for organizations relying on legacy backups or insufficient encryption practices for offline data retention, where the exposure of hashed passwords directly translates into a high probability of successful password recovery by malicious actors possessing sufficient computational resources.
To mitigate this vulnerability, immediate remediation should focus on updating the bcrypt configuration to utilize an appropriate work factor that aligns with current industry best practices and organizational security policies. This typically involves increasing the cost parameter to ensure that each hash computation takes several hundred milliseconds or more, depending on server capacity and acceptable login latency trade-offs. Additionally, organizations must enforce strict encryption standards for all system backups and data at rest to prevent unauthorized access to password hashes in the event of a storage breach. Implementing multi-factor authentication adds an additional layer of defense that can mitigate the impact of compromised passwords even if they are successfully cracked offline. Regular security audits and penetration testing should be conducted to verify that cryptographic configurations remain robust against evolving attack techniques and hardware capabilities.