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Critical

Authentication Bypass in Acer Connect W6x HTTP Authorization Handling

IdentifiersCVE-2026-49197CWE-287· Improper Authentication

CVE-2026-49197 is an improper authentication vulnerability affecting web endpoints intended for the Acer Connect application on Acer Connect W6x devices. The flaw is caused by incorrect validation of the HTTP Authorization header: when Base64 decoding of the header fails, the request is not promptly rejected and can proceed in a way that bypasses authentication checks. Acer’s advisory indicates the issue was addressed by improving handling of malformed Authorization headers so such requests are rejected rather than accepted. The vulnerability is remotely reachable over the network and affects protected web functionality exposed by the device’s application gateway/endpoints serving the Acer Connect app.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A remote, unauthenticated attacker can exploit malformed HTTP Authorization headers to bypass authentication on affected Acer Connect W6x web endpoints. Successful exploitation may allow unauthorized access to protected administrative functionality and, per the advisory context, could result in seizure of administrative control of the device. The provided CVSS v4.0 vector indicates high impact to confidentiality, integrity, and availability, including potential downstream impact to subsequent systems.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of the affected web management/application endpoints to untrusted networks, restrict access to trusted administrative hosts or management networks only, and monitor for malformed or anomalous HTTP Authorization headers targeting Acer Connect application endpoints. These are compensating controls only; the authoritative fix is the vendor firmware update.

Remediation

Patch, then assume compromise.

Update affected Acer Connect W6x devices to firmware version W6x_GBL_2.00.000008 or later. Acer states the fix improves handling of HTTP Authorization headers for endpoints serving the Acer Connect application so malformed requests are rejected instead of bypassing authentication checks. The update can be applied through the device management console at 192.168.76.1 via the system update function.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
AcerAcer Connectapplication
AcerPredator Connect W6X Firmwareoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-49197
NVD
nvd.nist.gov/vuln/detail/CVE-2026-49197
MITRE CWE · CWE-287
Improper Authentication
Vendor Advisory
community.acer.com/en/kb/articles/19672