Medium severity · published Oct 28, 2026
CVE-2026-87099
Cross-site scripting (XSS) vulnerability due to improper input validation
New
5.7
CVSS
–
EPSS
No
On KEV
Description
Cross-site scripting (XSS) vulnerability due to improper input validation. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 42587.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
Acronis Cyber Protect 17 · Acronis
before 42587 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87099
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87099
security-advisory.acronis.com
https://security-advisory.acronis.com/advisories/SEC-8835
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