CVE-2026-3943
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 · uneditedA vulnerability was found in H3C ACG1000-AK230 up to 20260227. This affects an unknown part of the file /webui/?aaa_portal_auth_local_submit. The manipulation of the argument suffix results in command injection. The attack can be launched remotely. The exploit has been made public and could be used. The vendor is investigating and remediating this issue.
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 confidenceCommand injection vulnerability in H3C ACG1000-AK230 firewall web UI. The 'suffix' parameter in /webui/?aaa_portal_auth_local_submit is not properly sanitized before being passed to system shell commands, allowing an attacker to inject and execute arbitrary OS commands remotely.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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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Confirm the device modelAccess the device console or web UI and identify the exact model number (should be ACG1000-AK230). Check the device label, startup banner, or web UI header for the model identification.Affected if The device is an H3C ACG1000-AK230 firewall
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Verify the web UI is accessibleAttempt to reach the web interface by browsing to the device IP on port 80 or 443. Confirm the /webui/ endpoint responds.Affected if The web UI is reachable from the network segment being tested
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Check if authentication portal is enabledInspect the device configuration for aaa_portal_auth_local or similar authentication portal settings. This can be done via CLI command 'display current-configuration | include portal' or through the web UI security/aaa settings.Affected if The aaa_portal_auth_local feature is enabled in the device configuration
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Compare installed firmware versionCheck the current firmware version via CLI command 'display version' or through the web UI system information page. Compare against any vendor release notes for CVE-2026-3943.Affected if The installed firmware version matches the affected range for this CVE (if vendor provides specific versions)
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Assess network exposure of the web UIDetermine if the web UI management interface is exposed to untrusted networks. Check interface bindings and access control lists using 'display ip interface' or 'display firewall policy' commands.Affected if The web UI interface is bound to any interface accessible from untrusted networks (WAN/Internet-facing)
If the device is an H3C ACG1000-AK230 with the aaa_portal_auth_local feature enabled and the web UI accessible from untrusted networks, the environment is affected by CVE-2026-3943.
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 dataRestrict network access to the web UI interface to trusted IPs only, preferably behind a management VPN. Apply vendor patches when available. If immediate patching is not possible, consider disabling the affected authentication portal or implementing WAF rules to detect and block command injection attempts.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-3943 — 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-2026-3943 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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