CVE-2026-49197Network attack vector

Unauthenticated endpoint access via failed Base64 decoding

Published May 29, 2026 · Updated May 29, 2026

Improper authentication in Acer Predator Connect W6x allows remote attackers to bypass web endpoint authentication via malformed headers. Affected Acer Connect app endpoints continue processing requests when Base64 decoding of the HTTP Authorization header fails instead of rejecting them. No credentials or user interaction are required, and the bypass exposes endpoint data and actions to network-reachable attackers.

CVSS severity10.0
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Acer Predator Connect W6x allows remote attackers to bypass web endpoint authentication via malformed headers. Affected Acer Connect app endpoints continue processing requests when Base64 decoding of the HTTP Authorization header fails instead of rejecting them. No credentials or user interaction are required, and the bypass exposes endpoint data and actions to network-reachable attackers.

The record

CVE
CVE-2026-49197
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Acer Inc.
Product
Predator Connect W6x
Classifications
CWE-287, CAPEC-115, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=W6x_GBL_2.00.000005 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acer Inc. · Predator Connect W6xversion=W6x_GBL_2.00.000005 <=*

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0AcerCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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