Vulnerability in Calero Verasmart
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.026 · change: -0.002
Affected products
- Calero Verasmart — versions 2022.0, 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.calero.com/ (Product, product)
- www.vulncheck.com/advisories/calero-verasmart-2022-r1-static-iis-machine-keys-e… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-26335?
- CVE-2026-26335 is a critical-severity vulnerability in Calero Verasmart, classified under Use of Hard-coded Cryptographic Key. CVSS score: 9.8/10. Published 2026-02-13.
- How severe is CVE-2026-26335?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-26335 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.