CVE-2025-40842 Ericsson Indoor Connect 8855 - Improper Neutralization of Input During Web Page Generation Vulnerability

High 8.5 Published 25 Mar 2026 Updated 25 Mar 2026

An XSS vulnerability in Ericsson Indoor Connect 8855 allows attackers to disclose and modify information, requiring an upgrade to the latest version.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-40842?

CVE-2025-40842 is a high-severity cross-site scripting vulnerability in Ericsson Indoor Connect 8855, published on 25 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Ericsson Indoor Connect 8855 versions prior to 2025.Q3 contains a Cross-Site Scripting (XSS) vulnerability which, if exploited, can lead to unauthorized disclosure and modification of certain information.

Weakness: CWE-79

Which versions are affected by CVE-2025-40842?

It affects 1 product.

Products include Ericsson Indoor Connect 8855 Firmware.

How do I fix CVE-2025-40842?

No fix has been published for CVE-2025-40842 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-40842 being exploited?

There is no known exploitation of CVE-2025-40842 in the wild and no public exploit code.

Sources

Also known as GHSA-9v43-hq86-3v99.