CVE-2026-49191
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 · uneditedThe production build of the M3WebServer hard-codes its backend API keys, which can be easily intercepted through verbose error handling pages.
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 · high confidenceM3WebServer's production build contains hard-coded backend API keys that are exposed through verbose error handling pages. An attacker can trigger error conditions to intercept these credentials and gain unauthorized access to backend systems.
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<= m6e_ai_1.00.000019CVSS 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 device modelCheck if the target device is an Acer Connect M6e 5g router. This can be done via the web admin interface (typically at 192.168.1.1) or by checking the device label.Affected if Device model is Acer Connect M6e 5g
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Check firmware versionAccess the router web admin interface and navigate to the firmware or status page to view the current firmware version. Alternatively, check via CLI if available.Affected if Firmware version is m6e_ai_1.00.000019 or lower
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Verify M3WebServer is in useIdentify if the embedded web server on the device is M3WebServer. This can be done by examining HTTP response headers, checking for M3WebServer-specific error pages, or reviewing the firmware filesystem if accessible.Affected if M3WebServer is the embedded web server
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Trigger error pages to check for credential leakageSend requests that intentionally cause errors (e.g., invalid parameters, malformed requests, accessing non-existent paths). Examine the returned error pages for any exposed API keys, backend credentials, or sensitive configuration details.Affected if Error pages display verbose diagnostic information including hardcoded credentials or API keys
A user is affected if they are running Acer Connect M6e 5g firmware at version m6e_ai_1.00.000019 or lower and the M3WebServer error pages expose hardcoded API keys or backend credentials.
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 dataReplace hard-coded API keys with secure secret management (environment variables or secrets vault), implement non-verbose error handling that doesn't expose sensitive data, and rotate any exposed credentials immediately.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,680.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-49191 — 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-2026-49191 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
- No spam, self-promotion, credentials, or personal data