CVE-2026-33432Public exploitNetwork attack vector

Pre-authentication bypass via unescaped LDAP filter username

Published Apr 20, 2026 · Updated Apr 20, 2026

LDAP injection in Roxy-WI 8.2.8.2 and earlier allows remote attackers to bypass authentication through the login username. The check_in_ldap function inserts the raw username into an LDAP filter, uses the first matching entry's DN, and binds that DN with the supplied password. LDAP authentication must be enabled; exploitation generally requires any real LDAP user's password, while no password is required if the directory permits anonymous or unauthenticated binds.

CVSS severity9.1
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in Roxy-WI 8.2.8.2 and earlier allows remote attackers to bypass authentication through the login username. The check_in_ldap function inserts the raw username into an LDAP filter, uses the first matching entry's DN, and binds that DN with the supplied password. LDAP authentication must be enabled; exploitation generally requires any real LDAP user's password, while no password is required if the directory permits anonymous or unauthenticated binds.

The record

CVE
CVE-2026-33432
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
Roxy-WI
Product
Roxy-WI
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 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=<= 8.2.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Roxy-WI · Roxy-WIversion=<= 8.2.8.2

Published CVSS scores

9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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