# CVE-2026-87886

Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.

- Page: https://www.vulneraibility.com/cve/CVE-2026-87886
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2026-09-16; CISA due date 2026-09-19
- EPSS: 0.23%
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2026-09-18)
- Weakness: CWE-276
- Published: 2026-09-17

## Affected versions

- Acronis Acronis Backup extension for Plesk: affected < 1.8.11.638
- Acronis Acronis Backup plugin for cPanel & WHM: affected < 1.9.3.1021
- Acronis Acronis Backup plugin for DirectAdmin: affected < 1.2.3.238

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://security-advisory.acronis.com/advisories/SEC-10986
- [exploit] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.