CVE-2026-26335

CRITICAL

Calero VeraSMART <2022 R1 - Remote Code Execution

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2026-26335. PoCs published by banyamer, XiaomingX, mbanyamer.

AI-analyzed exploit summary This Python script demonstrates a path traversal vulnerability in Repetier-Server <=1.4.10, allowing unauthorized file reads via crafted URLs with encoded traversal sequences. It includes multiple payload variants and configurable depth for bypassing path restrictions.

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.

Exploits (3)

exploitdb WORKING POC
by banyamer · pythonwebappsmultiple
https://www.exploit-db.com/exploits/52540

This Python script demonstrates a path traversal vulnerability in Repetier-Server <=1.4.10, allowing unauthorized file reads via crafted URLs with encoded traversal sequences. It includes multiple payload variants and configurable depth for bypassing path restrictions.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Repetier-Server <=1.4.10
No auth needed
Prerequisites: Network access to Repetier-Server web interface
devstral-2 · analyzed May 05, 2026 Full analysis →
github WORKING POC 10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-26335

This repository contains a functional Python exploit for CVE-2026-26335, targeting Calero VeraSMART < 2022 R1. The exploit leverages hardcoded ASP.NET MachineKey values to forge a malicious ViewState payload, achieving remote code execution via deserialization.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Calero VeraSMART < 2022 R1
No auth needed
Prerequisites: ysoserial.net · static MachineKey values (validationKey and decryptionKey)
devstral-2 · analyzed Feb 27, 2026 Full analysis →
nomisec WORKING POC
by mbanyamer · poc
https://github.com/mbanyamer/CVE-2026-26335-Calero-VeraSMART-RCE

This is a functional exploit for CVE-2026-26335, targeting Calero VeraSMART < 2022 R1. It leverages hardcoded ASP.NET MachineKey values to forge a malicious ViewState payload using ysoserial.net, achieving remote code execution via deserialization.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Calero VeraSMART < 2022 R1
No auth needed
Prerequisites: ysoserial.net · knowledge of target's MachineKey values · ViewState-enabled endpoint
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0281
EPSS Percentile 84.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-321
Status published
Products (2)
calero/verasmart 2022.0
calero/verasmart < 2022.0
Published Feb 13, 2026
Tracked Since Feb 18, 2026