CVE-2021-22333
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 · uneditedThere is an Improper Validation of Array Index vulnerability in Huawei Smartphone. Successful exploitation of this vulnerability may cause code to execute, thus obtaining system permissions.
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 confidenceCVE-2021-22333 is an improper array index validation vulnerability in Huawei smartphones that allows attackers to achieve code execution with system (root) privileges. The vulnerability stems from insufficient bounds checking when accessing array elements, likely leading to out-of-bounds memory write conditions that can be triggered remotely. With a CVSS 9.8 rating, this is a trivially exploitable flaw requiring no authentication or user interaction.
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= 9.1.0= 9.1.1= 10.0.0= 10.1.0= 10.1.1= 11.0.0= 2.1.1= 3.0.0= 3.1.0= 3.1.1= 4.0.0CVSS 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
- 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.
-
Confirm Huawei device modelNavigate to Settings > About Phone on the device and identify the model name (e.g., Huawei P30, Mate 20, etc.)Affected if Device is a Huawei smartphone running EMUI or Magic UI firmware
-
Check EMUI version installedNavigate to Settings > About Phone > EMUI Version and record the exact version number displayedAffected if Installed EMUI version is 9.1.0, 9.1.1, 10.0.0, 10.1.0, 10.1.1, or 11.0.0
-
Check Magic UI version installedNavigate to Settings > About Phone > Magic UI Version (or EMUI Version on Magic UI devices) and record the exact version number displayedAffected if Installed Magic UI version is 2.1.1, 3.0.0, 3.1.0, 3.1.1, or 4.0.0
-
Verify Android security patch levelNavigate to Settings > About Phone > Build Number or Settings > Security > Security Patch Level to check the installed security updateAffected if Security patch level is earlier than the official fix release date for this CVE
The device is affected if it is a Huawei smartphone running any of the specific EMUI versions (9.1.0 through 11.0.0) or Magic UI versions (2.1.1 through 4.0.0) listed as affected, and the vendor security patch addressing this vulnerability has not been applied.
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 official Huawei security patches for affected devices immediately; until patches are available, avoid installing applications from untrusted sources and refrain from visiting untrusted websites.
- Consultation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22333 — 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-2021-22333 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data