Vulnerability · Published Feb 13, 2026 · Assigned by VulnCheck
CVE-2026-26335Calero VeraSMART < 2022 R1 Static IIS Machine Keys Enable ViewState RCE
Critical 9.3
In plain English
A critical-severity security flaw in VeraSMART from Calero. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.0% (higher than 87% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
Weakness: CWE-321 · 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