# CVE-2026-26335

## Summary

- **CVE ID:** CVE-2026-26335
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-321
- **Published:** Feb 13, 2026
- **Last Modified:** Jul 14, 2026

## 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

- Calero — VeraSMART (0)

## References

- [CNA](https://www.calero.com/)
- [CNA](https://www.vulncheck.com/advisories/calero-verasmart-2022-r1-static-iis-machine-keys-enable-viewstate-rce)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 2.81%
- **EPSS Percentile:** 85.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._