Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Calero | Verasmart | < 2022.0 |
Related Weaknesses (CWE)
References
- https://www.calero.com/Product
- https://www.vulncheck.com/advisories/calero-verasmart-2022-r1-static-iis-machineThird Party Advisory
FAQ
What is CVE-2026-26335?
CVE-2026-26335 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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\\we...
How severe is CVE-2026-26335?
CVE-2026-26335 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-26335?
Check the references section above for vendor advisories and patch information. Affected products include: Calero Verasmart.