CVE-2026-26335 CRITICAL

CVE-2026-26335: Calero VeraSMART < 2022 R1 Static IIS Machine Keys Enable ViewState RCE

Vendor Calero
Product VeraSMART
Weakness CWE-321
Published February 13, 2026
Last update February 18, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Calero VeraSMART versions prior to 2022 R1 use static ASP.NET/IIS machineKey values configured for the VeraSMART web application and stored in C:\\Program Files (x86)\\Veramark\\VeraSMART\\WebRoot\\web.config. An attacker who obtains these keys can craft a valid ASP.NET ViewState payload that passes integrity validation and is accepted by the application, resulting in server-side deserialization and remote code execution in the context of the IIS application.

Key dates

02Disclosure timeline

February 13, 2026 CVE published
February 18, 2026 Record updated