How to fix CVE-2026-6351?

Within 24 hours: Identify all Openfind MailGates/MailAudit instances and document current versions across the organization. Within 7 days: Apply vendor patches-upgrade MailGates/MailAudit 5.x to version 5.2.10.099 or later, and 6.x to version 6.1.10.054 or later. Verify patch deployment across all instances. Within 30 days: Conduct security audit of MailGates/MailAudit logs for suspicious HTTP header patterns and conduct file access reviews to detect any prior exploitation.

CVE-2026-6351

EUVD-2026-23167 HIGH

2026-04-16 twcert

GHSA-mgwx-w2xc-pjq7

Code Injection

8.7

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 05:56 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

patch_available

Apr 16, 2026 - 05:29 EUVD

6.1.10.054,5.2.10.099

Analysis Updated

Apr 16, 2026 - 03:44 vuln.today

v2 (cvss_changed)

Re-analysis Queued

Apr 16, 2026 - 03:34 vuln.today

cvss_changed

CVSS Changed

Apr 16, 2026 - 03:34 NVD

7.5 (HIGH) 8.7 (HIGH)

Analysis Generated

Apr 16, 2026 - 02:52 vuln.today

DescriptionNVD

MailGates/MailAudit developed by Openfind has a CRLF Injection vulnerability, allowing unauthenticated remote attackers to exploit this vulnerability to read system files.

AnalysisAI

CRLF Injection in Openfind MailGates/MailAudit allows remote unauthenticated attackers to read arbitrary system files via HTTP header manipulation. Affects MailGates/MailAudit versions 5.0-6.0 (prior to 5.2.10.099 and 6.1.10.054 respectively). …

RemediationAI

Within 24 hours: Identify all Openfind MailGates/MailAudit instances and document current versions across the organization. Within 7 days: Apply vendor patches-upgrade MailGates/MailAudit 5.x to version 5.2.10.099 or later, and 6.x to version 6.1.10.054 or later. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-6351 vulnerability details – vuln.today

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CVE-2026-6351

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Analysis

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CVE-2026-6351

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code