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CVE-2026-87886

7.8 · HIGHActively Exploited

Local privilege escalation due to insecure file permissions.

Published Sep 17, 2026acronisCWE-276EPSS 0.23%

Overview

CVE-2026-87886 is a high-severity vulnerability affecting acronis acronis_backup. It was published on September 17, 2026 and has a CVSS 3.0 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from acronis. Update acronis_backup to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
acronisacronis_backup>= 0, < 1.2.3Affected

References

Refsecurity-advisory.acronis.com/advisories/SEC-10986CISAwww.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886

How CyberStrike helps

Frequently asked questions

What is CVE-2026-87886?

CVE-2026-87886 is a high-severity vulnerability affecting acronis acronis_backup. It was published on September 17, 2026 and has a CVSS 3.0 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2026-87886?

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-87886?

Check the references section for vendor advisories and patches from acronis. Update acronis_backup to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-87886?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-87886 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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