CVE-2026-57641: Unauthenticated CSRF in Real Estate 7 ≤3.5.9

Technical summary

CVE-2026-57641 is an unauthenticated CSRF vulnerability (CWE-352) in Real Estate 7 up to version 3.5.9. The application fails to implement or properly validate anti-CSRF tokens on state-changing requests, allowing attackers to craft requests that execute on behalf of users without their knowledge or consent. The vulnerability has a CVSS 3.1 score of 6.5 (MEDIUM), with a vector indicating network-based attack (AV:N), low complexity (AC:L), no privileges required (PR:N), and user interaction required (UI:R). Impact is limited to availability (A:H), suggesting the attack primarily disrupts service rather than compromising confidentiality or integrity.

Business impact

CSRF exploitation can lead to unintended data modifications, service disruptions, or unauthorized transactions within Real Estate 7 installations. Depending on the application's functionality, attackers could alter property listings, manipulate transaction states, or trigger administrative actions. While the CVSS rating reflects availability as the primary impact, the reputational and operational consequences of unexplained changes to user accounts or listings can erode customer trust. Organizations must assume that any user with a Real Estate 7 session is vulnerable if they visit an attacker-controlled site.

Affected systems

Real Estate 7 versions 3.5.9 and earlier are affected. The vulnerability is unauthenticated, meaning any deployment of these versions is potentially exploitable regardless of network exposure or user role. Verify your deployed version immediately; if you are running version 3.5.9 or below, your installation requires remediation.

Exploitability

This vulnerability requires user interaction (a user must visit a malicious site or click a link) but no authentication, making it a practical attack vector. An attacker needs only basic knowledge of HTML and web requests to craft an exploit. Public disclosure date has passed (published June 26, 2026), and the lack of KEV listing does not indicate maturity of exploitation—CSRF vulnerabilities are trivial to weaponize once the flaw is known. Assume active exploitation is possible.

Remediation

Upgrade Real Estate 7 to a version higher than 3.5.9. Verify the exact patched version number against the vendor's official advisory and changelog. Until patching is possible, implement network-level mitigations such as restricting access to Real Estate 7 administrative interfaces, enforcing HTTPS with secure cookie flags (SameSite attribute), and educating users to avoid clicking links from untrusted sources while logged into the application.

Patch guidance

Contact your Real Estate 7 vendor or check their official advisory for the release containing the fix. Verify against the vendor's security bulletin to confirm the version resolves CVE-2026-57641 before deploying. Test the update in a non-production environment first. Apply the patch as soon as feasible, prioritizing instances exposed to untrusted networks or handling sensitive transactions.

Detection guidance

Monitor for unexpected state-changing requests (POST, PUT, DELETE) originating from external referrers or lacking proper CSRF token validation. Log and inspect admin actions that lack typical user session context. Review web server and application logs for requests with suspicious Referer headers or missing Referer/Origin fields on sensitive operations. Implement or review your CSRF token validation logic to ensure tokens are session-bound and verified on all state-altering endpoints.

Why prioritize this

Although rated MEDIUM severity, this vulnerability is unauthenticated and requires only user interaction, lowering the barrier to exploitation. Any user session in a vulnerable Real Estate 7 instance can be hijacked to perform unintended actions. The lack of authentication requirement and the ease of CSRF exploitation warrant treating this as a higher operational priority than the CVSS score alone suggests. Patch this within your normal critical/high queue.

Risk score, explained

CVSS 3.1 score of 6.5 reflects the attack complexity (network, low complexity), lack of privilege requirement, and mandatory user interaction. The 'High' availability impact (A:H) suggests significant service disruption potential, though integrity and confidentiality are not directly compromised. The score appropriately captures that exploitation is practical and widespread impact is possible, but the need for user interaction prevents a higher rating. Context matters: if Real Estate 7 handles financial transactions, upgrade the priority above the CVSS score.

Frequently asked questions