Overview
The Common Vulnerabilities and Exposures (CVE) system has recently documented a critical security flaw in Reolink v4.54.0.4.20250526, labeled CVE-2025-55619. This vulnerability involves the use of a hardcoded encryption key and initialization vector within the software, posing serious security concerns to any systems or networks running this version of the software. The severity of this issue is underscored by its ability to compromise system security and potentially lead to unauthorized access or data leakage.
This vulnerability affects all users of the Reolink v4.54.0.4.20250526 software, and its implications are vast. Given that an attacker can leverage this flaw to decrypt access tokens and web session tokens, the vulnerability presents a significant risk to the confidentiality, integrity, and availability of affected systems.
Vulnerability Summary
CVE ID: CVE-2025-55619
Severity: Critical (9.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Reolink | v4.54.0.4.20250526
How the Exploit Works
The vulnerability stems from the presence of hardcoded encryption keys and initialization vectors in the Reolink software. These hardcoded keys can be discovered via reverse engineering of the software’s codebase. Once these keys are known, an attacker can decrypt access tokens and web session tokens that are stored within the app. This decrypted information can be used to gain unauthorized access to the system or to extract sensitive data.
Conceptual Example Code
Below is a conceptual representation of how an attacker might exploit this vulnerability:
# Reverse engineering the app to extract the hardcoded encryption key and IV
$ reverse_engineer -app Reolink_v4.54.0.4.20250526 -extract_keys
# Using the extracted keys to decrypt a captured web session token
$ decrypt -key extracted_key -iv extracted_iv -input captured_web_session_tokenThis example assumes that the attacker has already captured a web session token from network traffic, which they then decrypt using the extracted encryption key and initialization vector.
Recommended Mitigation
Users affected by this vulnerability are advised to apply the vendor patch as soon as it becomes available. In the interim, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help mitigate the risk of exploitation. Regularly reviewing and updating security measures is also recommended to maintain system integrity against emerging threats.