CVE-2025-40836
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedEricsson Indoor Connect 8855 contains an improper input validation vulnerability which if exploited can allow an attacker to execute commands with escalated privileges.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceEricsson Indoor Connect 8855 contains an improper input validation vulnerability that allows authenticated or unauthenticated attackers to execute arbitrary commands with escalated (likely root or administrator) privileges. The vulnerability stems from insufficient validation of user-supplied input in the device firmware, enabling command injection.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2025.q2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the device firmware versionAccess the device admin interface or check the system information page via the web UI or CLI command (typically available through 'show version' or 'system info' commands). Compare the displayed firmware version against the affected range: any version prior to 2025.q2 is vulnerable.Affected if Firmware version is below 2025.q2 (e.g., 2024.x, 2025.q1, or any earlier release).
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Verify management interface exposureDetermine if the device management web interface or CLI ports (typically HTTP/HTTPS on ports 80/443, or SSH on port 22) are reachable from untrusted networks. Use network scanning tools or check firewall rules to list accessible IPs/ports.Affected if The management interface is accessible from external networks or untrusted VLANs without VPN or IP restriction.
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Review authentication logs for unusual entriesCheck the device system logs or authentication logs for failed login attempts, especially those containing malformed input, or successful logins from unknown IP addresses. Look for entries indicating command injection attempts.Affected if Logs show repeated authentication failures with special characters, unexpected commands in login fields, or unauthorized successful logins.
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Inspect for unauthorized processes or filesExamine running processes on the device (if CLI access is available) for unknown or suspicious processes. Check for newly created files in system directories that were not part of the original firmware.Affected if Unexpected processes are running or unauthorized scripts/executables exist in system directories.
A user is affected if their Ericsson Indoor Connect 8855 runs firmware version lower than 2025.q2 AND has its management interface exposed to network access.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2025.q2
Apply the vendor-supplied firmware patch when available; until then, restrict network access to the device management interfaces and monitor for suspicious command execution patterns.
2025.q2 or later firmware for Ericsson Indoor Connect 8855
- 1. Identify the current firmware version of the Ericsson Indoor Connect 8855 device
- 2. Access the device management interface or use the vendor-provided firmware update mechanism
- 3. Obtain the firmware version 2025.q2 or later from Ericsson's official support channels
- 4. Apply the firmware update following the vendor's documented upgrade procedure
- 5. Verify the upgrade was successful by confirming the new firmware version
- 6. Validate that the vulnerability is resolved by testing the input validation functionality
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-40836 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-40836 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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