CVE-2025-40842: Ericsson Indoor Connect 8855 versions prior to 2025.Q3 contains a Cross-Site Scripting (XSS) vulnerability whi

Q: How do I fix CVE-2025-40842?

indoor connect 8855 firmware: upgrade to 2025.q3. Exact commands for each OS are on this page.

Q: Is CVE-2025-40842 being exploited?

CVE-2025-40842 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-40842 affect?

CVE-2025-40842 affects indoor connect 8855 firmware. Severity is medium (CVSS 6.1). 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.

Q: How urgent is CVE-2025-40842?

Priority 22/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2025-40842 is a medium-severity flaw (CVSS 6.1) affecting indoor connect 8855 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-25
Last modified	2026-06-17

Publisher (CNA): Ericsson · Vendor: ericsson

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-25 14:16 UTCPublished CVE record published
2026-06-17 09:22 UTCUpdated Record last modified

ericsson indoor connect 8855 firmware UPGRADE

Affected: < 2025.q3

Fixed in: 2025.q3

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-40842?

indoor connect 8855 firmware: upgrade to 2025.q3. Exact commands for each OS are on this page.

Is CVE-2025-40842 being exploited?

CVE-2025-40842 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-40842 affect?

CVE-2025-40842 affects indoor connect 8855 firmware. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2025-40842?

Priority 22/100. No elevated risk signals yet.

Software pages

Ericsson vulnerabilities

Related CVEs

CVE-2025-40841 MEDIUM 4.3 UPGRADE Ericsson Indoor Connect 8855 versions prior to 2025.Q3 contains a Cross-Site Request Forgery (CSRF) vulnerabil
CVE-2025-27260 HIGH 7.5 UPGRADE Ericsson Indoor Connect 8855 versions prior to 2025.Q3 contains an Improper Filtering of Special Elements vuln

References

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