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CVE-2026-26335

Calero Verasmart remote code execution

9.8 CRITICALEPSS 2.65%
  1. Published13 Feb 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Calero Verasmart< 2022.0 · 2022.0

Remediation

Fixed in
Calero Verasmart≥ 2022.0

References

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Frequently asked

Is CVE-2026-26335 being actively exploited?

CVE-2026-26335 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.65%.

How severe is CVE-2026-26335?

CVE-2026-26335 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.65% probability of exploitation.

Which products are affected by CVE-2026-26335?

Affected products include Calero Verasmart.

How do I fix CVE-2026-26335?

Upgrade affected software to a fixed version, for example Calero Verasmart 2022.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-26335 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.