Kentico flaws being used in attacks

CISA lists 4 flaws in Kentico products as being used in attacks, most recently on 20 Apr 2026.

What to do

1. Update every Kentico product you use.Install the updates Kentico offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksAdded by CISA on 20 Apr 2026
   Kentico Xperience
   CVE-2025-2749Kentico Xperience Path Traversal Vulnerability
   Kentico Xperience contains a path traversal vulnerability that could allow an authenticated user's Staging Sync Server to upload arbitrary data to path relative locations.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 20 Oct 2025
   Kentico Xperience CMS
   CVE-2025-2747Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability
   Kentico Xperience CMS contains an authentication bypass using an alternate path or channel vulnerability that could allow an attacker to control administrative objects.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 20 Oct 2025
   Kentico Xperience CMS
   CVE-2025-2746Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability
   Kentico Xperience CMS contains an authentication bypass using an alternate path or channel vulnerability that could allow an attacker to control administrative objects.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
4. Being used in attacksAdded by CISA on 25 Mar 2022
   Kentico Xperience
   CVE-2019-10068Kentico Xperience Deserialization of Untrusted Data Vulnerability
   Kentico contains a failure to validate security headers. This deserialization can led to unauthenticated remote code execution.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Kentico on CISA’s site.