CVE-2026-6351Network attack vector

Unauthenticated system file read via CRLF injection

Published Apr 16, 2026 · Updated Apr 16, 2026

CRLF injection in Openfind MailGates and MailAudit 5.0 and 6.0 allows remote attackers to read system files without authentication. The vendor identifies the affected locus only as a CGI component and does not disclose which request field accepts injected CRLF sequences or how they select a file. The affected CGI is network-reachable before authentication, and the documented consequence is limited to unauthorized system-file reads.

CVSS severity8.7
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CRLF injection in Openfind MailGates and MailAudit 5.0 and 6.0 allows remote attackers to read system files without authentication. The vendor identifies the affected locus only as a CGI component and does not disclose which request field accepts injected CRLF sequences or how they select a file. The affected CGI is network-reachable before authentication, and the documented consequence is limited to unauthorized system-file reads.

The record

CVE
CVE-2026-6351
Published
Apr 16, 2026
Updated
Apr 16, 2026
Vendor
Openfind
Product
MailAudit
Classifications
CWE-93, CAPEC-15, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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=5.0 <5.2.10.099
  2. Affected versionversion=6.0 <6.1.10.054

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Openfind · MailAuditversion=5.0 <5.2.10.099; version=6.0 <6.1.10.054
Openfind · MailGatesversion=5.0 <5.2.10.099; version=6.0 <6.1.10.054

Published CVSS scores

7.5TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7TWCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
CAPEC-15Command Delimiters
T1190Exploit Public-Facing Application
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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