CVE-2026-26335

critical · 9.3

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.

9.3

CVSS

2.9%

EPSS (exploit prob.)

86th

EPSS percentile

2026-02-13

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-321

Affected products

Vendor	Product	Affected versions
calero	verasmart	< 2022.0
calero	verasmart	2022.0

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-26335