CVE-2025-71256
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 · uneditedIn nr modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed.
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 confidenceThis vulnerability exists in a 5G NR (New Radio) modem component where improper input validation could allow remote attackers to cause denial of service without requiring any elevated privileges. The lack of proper validation on inputs to the modem could allow specially crafted requests to crash or render the modem unresponsive.
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= 13.0= 14.0= 15.0= 16.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 Android versionCheck the device settings under Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADBAffected if The version is 13.0, 14.0, 15.0, or 16.0
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Confirm 5G NR hardware capabilityCheck device specifications or settings for 5G New Radio (NR) support. Look for 5G, NR, or mmWave indicators in network settings or hardware documentationAffected if The device has a 5G NR modem component
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Check if 5G NR is enabledNavigate to Settings > Mobile Network > Preferred Network Type, or run 'settings get global preferred_network_mode' via ADB to see if NR/5G modes are selectedAffected if 5G NR network mode is active or selectable on the device
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Assess network accessibility of modemReview firewall rules and network exposure. Check if the device is on a trusted network or if the modem interface is accessible from untrusted networksAffected if The 5G NR modem interface is reachable from network segments controlled by untrusted or unknown parties
A user is affected if they run Android 13.0-16.0 on a device with an active 5G NR modem component that can be reached by an attacker on the network.
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.
From vendor dataApply the vendor-provided firmware update that addresses input validation in the NR modem component. If no update is immediately available, implement network segmentation to reduce attack surface exposure and monitor for anomalous modem behavior.
- Consultation4.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-71256 — 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-2025-71256 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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