CVE-2026-6351: CWE-93 Improper neutralization of CRLF sequences ('CRLF injection') in Openfind MailGates
Openfind MailGates versions 5. 0 and 6. 0 contain a CRLF injection vulnerability (CWE-93) that allows unauthenticated remote attackers to read system files. This vulnerability is classified as high severity with a CVSS 4. 0 score of 8. 7, indicating it is exploitable over the network without authentication and can lead to significant information disclosure. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-6351 is a CRLF injection vulnerability in Openfind MailGates versions 5.0 and 6.0. The vulnerability arises from improper neutralization of CRLF sequences, enabling unauthenticated remote attackers to exploit the flaw to read system files. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality. The vulnerability is publicly disclosed but lacks an official fix or patch as of the published date.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to read system files, potentially exposing sensitive information. This can compromise confidentiality but does not indicate direct integrity or availability impact. The high CVSS score reflects the ease of exploitation and significant confidentiality impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, organizations should consider restricting network access to affected MailGates versions and monitor for suspicious activity related to CRLF injection attempts. No vendor-provided mitigation or temporary fix is currently documented.
CVE-2026-6351: CWE-93 Improper neutralization of CRLF sequences ('CRLF injection') in Openfind MailGates
Description
Openfind MailGates versions 5. 0 and 6. 0 contain a CRLF injection vulnerability (CWE-93) that allows unauthenticated remote attackers to read system files. This vulnerability is classified as high severity with a CVSS 4. 0 score of 8. 7, indicating it is exploitable over the network without authentication and can lead to significant information disclosure. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6351 is a CRLF injection vulnerability in Openfind MailGates versions 5.0 and 6.0. The vulnerability arises from improper neutralization of CRLF sequences, enabling unauthenticated remote attackers to exploit the flaw to read system files. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality. The vulnerability is publicly disclosed but lacks an official fix or patch as of the published date.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to read system files, potentially exposing sensitive information. This can compromise confidentiality but does not indicate direct integrity or availability impact. The high CVSS score reflects the ease of exploitation and significant confidentiality impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, organizations should consider restricting network access to affected MailGates versions and monitor for suspicious activity related to CRLF injection attempts. No vendor-provided mitigation or temporary fix is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- twcert
- Date Reserved
- 2026-04-15T11:32:32.176Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e04d9c82d89c981f080c31
Added to database: 4/16/2026, 2:46:52 AM
Last enriched: 4/16/2026, 3:01:50 AM
Last updated: 4/16/2026, 4:59:26 AM
Views: 7
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.