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CVE-2026-114425— Forged LFT metadata permits arbitrary file read and deletion

Quick assessment

Affected
SEPPmail AG SEPPmail Secure Email Gateway (SEG)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SEPPmail Secure Email Gateway 在 15.1.1 版本之前存在漏洞：该网关会信任由外部提供的大文件传输（Large File Transfer, LFT）附件元数据中所指定的文件路径。当启用 LFT 功能且邮件到达受影响的安全邮件处理路径时，未经身份验证的远程发送者可诱使邮件处理工作进程披露、移动或删除可访问的常规文件。经确认，这些工作进程是以 root 用户身份运行的。

CVSS 9.2 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-114425

Vulnerability Information
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Vulnerability Title
Forged LFT metadata permits arbitrary file read and deletion
Source: CVE Program / CVE List V5
Vulnerability Description
SEPPmail Secure Email Gateway before 15.1.1 trusts a file path supplied in externally provided Large File Transfer attachment metadata. An unauthenticated remote sender can cause the mail-processing worker to disclose, move, or delete an accessible regular file when LFT is enabled and the message reaches an affected secure-mail processing path. The validated workers ran as root.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SEPPmail AG SEPPmail Secure Email Gateway (SEG) 0 ~ 15.1.1 -

II. Public POCs for CVE-2026-114425

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III. Intelligence Information for CVE-2026-114425

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Other References for CVE-2026-114425 (1)

Same Patch Batch · SEPPmail AG · 2026-11-04 · 5 CVEs total

CVE-2026-114424 9.2 CRITICAL Code execution through double evaluation in address replacement rules
CVE-2026-114426 8.7 HIGH Pre-authentication upload parsing permits resource exhaustion
CVE-2026-114421 8.3 HIGH Empty initial password permits GINA account takeover
CVE-2026-114420 6.9 MEDIUM LDAP wildcard injection exposes GINA recipient accounts

IV. Related Vulnerabilities

Same product: SEPPmail Secure Email Gateway (SEG)
Same vendor: SEPPmail AG
Same weakness: CWE-73