CVE-2026-26335CWE-321

Calero VeraSMART < 2022 R1 Static IIS Machine Keys Enable ViewState RCE

Critical · published February 13, 2026

CVSS v4.0
9.3
EPSS
3%
Percentile
86.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
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
EPSS
0.02899 · 86.8th percentile
Weakness
CWE-321 · Use of Hard-coded Cryptographic Key
Published
2026-02-13T20:51Z
EPSS history
Timeline
  • 13 FEB 20:51Z
    Calero VeraSMART < 2022 R1 Static IIS Machine Keys Enable ViewState RCE
    cvelistv5