---
id: CVE-2026-87099
title: Cross-site scripting (XSS) vulnerability due to improper input validation
summary: >-
  Cross-site scripting (XSS) vulnerability due to improper input validation. The
  following products are affected: Acronis Cyber Protect 17 (Linux, Windows)
  before build 42587.
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Acronis
product: Acronis Cyber Protect 17
affected:
  - cyber_protect_17 >= unspecified < 42587
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T10:10:24.198Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87099'
references:
  - url: 'https://security-advisory.acronis.com/advisories/SEC-8835'
    label: SEC-8835
tags:
  - cve.org
ingestedAt: '2026-10-28T11:09:40.471Z'
epss: 0.00242
epssPercentile: 0.15431
---

## Overview

Cross-site scripting (XSS) vulnerability due to improper input validation. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 42587.

## Affected

- `cyber_protect_17 >= unspecified < 42587`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.