CVE-2025-55625 describes an open redirect vulnerability identified in Reolink software version 4.54.0.4.20250526. This vulnerability allows an attacker to craft a specially designed URL that, when clicked by a user, redirects them to a potentially malicious external website. Open redirect vulnerabilities occur when a web application accepts untrusted input that specifies a link to an external site and redirects users without proper validation. In this case, the vulnerability is disputed by the supplier, who claims that the redirection behavior is intentional to support Alexa URLs, which may change domains over time. However, this design choice introduces a security risk because attackers can exploit the redirection mechanism to lure users to phishing or malware-hosting sites, leveraging the trust users place in the original domain. The CVSS v3.1 base score is 6.3, indicating a medium severity level. The vector string (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L) shows that the attack can be performed remotely over the network without privileges, requires user interaction, and impacts confidentiality, integrity, and availability to a limited extent. The vulnerability is categorized under CWE-601 (Open Redirect), which is a common web security issue. No patches or known exploits in the wild have been reported at the time of publication. The lack of affected version details beyond the stated version suggests that the vulnerability may be limited to or first identified in the specified version. Overall, this vulnerability can be used in social engineering attacks to redirect users to malicious sites, potentially leading to credential theft, malware infection, or other downstream attacks.

For European organizations using Reolink products, particularly version 4.54.0.4.20250526, this vulnerability poses a moderate risk. The primary impact is on user trust and potential exposure to phishing or malware campaigns initiated via malicious redirects. This can lead to compromised user credentials, unauthorized access, or infection of corporate networks if users are redirected to malicious payloads. The confidentiality, integrity, and availability impacts are limited but non-negligible, especially if attackers combine this vulnerability with other attack vectors. Organizations relying on Reolink devices for security surveillance or IoT monitoring could see indirect impacts if attackers exploit this vulnerability to gain footholds or disrupt operations. Additionally, regulatory frameworks in Europe such as GDPR emphasize protecting user data and preventing unauthorized access, so exploitation could lead to compliance issues and reputational damage. The requirement for user interaction reduces the likelihood of automated exploitation but does not eliminate risk, especially in environments where users may be targeted via phishing emails or social engineering campaigns.

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Validate and sanitize all URLs used in redirection mechanisms within Reolink interfaces or associated web portals to ensure only trusted domains are allowed. 2) Employ web application firewalls (WAFs) with rules designed to detect and block suspicious redirect patterns targeting Reolink URLs. 3) Educate users about the risks of clicking on unexpected or suspicious links, especially those purporting to come from Reolink or related services. 4) Monitor network traffic for unusual outbound connections that may indicate redirection to malicious sites. 5) Engage with Reolink support to confirm if patches or configuration options are available to restrict or disable the redirect feature. 6) Where possible, restrict access to Reolink management interfaces to trusted networks and users to reduce exposure. 7) Implement multi-factor authentication (MFA) on accounts associated with Reolink devices to limit impact if credentials are compromised via phishing. 8) Regularly review and update security policies to include handling of open redirect risks and incorporate this vulnerability into incident response plans. These steps go beyond generic advice by focusing on both technical controls and user awareness tailored to the specific nature of this vulnerability.