CVE-2025-20724
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 wlan AP driver, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local information disclosure with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418894; Issue ID: MSV-3475.
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 confidenceIn the WLAN AP driver, an incorrect bounds check allows an out-of-bounds read vulnerability, enabling local information disclosure. The issue requires User execution privileges but no user interaction for exploitation.
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<= 7.6.7.2= 19.07.0= 21.02.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 system typeCheck if the target system uses Mediatek SDK or OpenWrt. On the device, run: cat /proc/version or check for Mediatek-specific files in /etc or /lib/firmware. For OpenWrt, check: cat /etc/openwrt_releaseAffected if The system is running Mediatek Software Development Kit or OpenWrt versions 19.07.0 or 21.02.0
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Check Mediatek SDK versionFor Mediatek-based systems, check the SDK version by running: cat /etc/version or cat /proc/mtk_version. Also check for file: /usr/lib/libwlan_sdk.so or similar Mediatek WLAN SDK files.Affected if SDK version is 7.6.7.2 or earlier (any version <= 7.6.7.2)
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Check OpenWrt versionFor OpenWrt systems, run: cat /etc/openwrt_release or cat /proc/version to display the installed version string.Affected if OpenWrt version is exactly 19.07.0 or 21.02.0
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Verify WLAN AP driver is presentCheck if the WLAN AP driver module is loaded or present. Run: lsmod | grep -i wlan or check for files like /lib/modules/*/wlan_ap.ko or /dev/wlan0. Also check: iwconfig or ip link showAffected if WLAN AP driver (wireless AP functionality) is loaded or active on the system
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Confirm user execution contextVerify the current privilege level: run whoami or id. The vulnerability requires User execution privileges, meaning any local user account can potentially trigger the out-of-bounds read.Affected if A local user account exists on the system with access to the WLAN AP driver interface
The system is affected if it runs Mediatek SDK <= 7.6.7.2 or OpenWrt 19.07.0/21.02.0 AND has the WLAN AP driver enabled, allowing a local user to potentially trigger the out-of-bounds read for information disclosure.
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 vendor patch WCNCR00418894 to correct the bounds checking logic in the WLAN AP driver.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20724 — 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-2025-20724 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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- Version or environment caveats, and links to real fixes
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