CVE-2023-37286Network attack vector

Unauthenticated code execution via fixed ViewState key

Published Jul 10, 2023 · Updated Nov 12, 2024

Unsafe ViewState deserialization in SmartSoft SmartBPM.NET 6.70 allows remote attackers to execute arbitrary code without authentication. The application uses a fixed ASP.NET machine key to validate attacker-supplied ViewState, allowing a correctly signed serialized payload to reach server-side deserialization. No account or user interaction is required; successful exploitation runs code in the server context and can interrupt the service.

CVSS severity9.8
Critical
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe ViewState deserialization in SmartSoft SmartBPM.NET 6.70 allows remote attackers to execute arbitrary code without authentication. The application uses a fixed ASP.NET machine key to validate attacker-supplied ViewState, allowing a correctly signed serialized payload to reach server-side deserialization. No account or user interaction is required; successful exploitation runs code in the server context and can interrupt the service.

The record

CVE
CVE-2023-37286
Published
Jul 10, 2023
Updated
Nov 12, 2024
Vendor
SmartSoft
Product
SmartBPM.NET
Classifications
CWE-798, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SmartSoft · SmartBPM.NETversion=6.70

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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