CVE-2026-26335

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 v4.0

9.3 CRITICALCVSS: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

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

2.81% chance of exploitation in the next 30 days, 86th percentile

Published

2026-02-13

Updated

2026-07-14

Proof-of-concept exploits (1)

• mbanyamer/CVE-2026-26335-Calero-VeraSMART-RCE0★ · 2026-02-14

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/52540

References

• CVE Record
• NVD entry

Related

• CVE-2019-7711
• CVE-2021-41579
• CVE-2023-31059
• CVE-2025-24076
• CVE-2025-24813
• CVE-2025-30397