CVE-2025-6811Network attack vector

Remote code execution via untrusted deserialization

Published Jul 7, 2025 · Updated Jul 7, 2025

Deserialization of untrusted data in ActiveReports.NET 18.1.1 allows remote attackers to execute code through TypeResolutionService. TypeResolutionService accepts user-supplied data without adequate validation and deserializes it, allowing attacker-controlled content to run in the current process. Exploitation requires an application workflow to pass attacker-controlled data to the library, and the reachable vector depends on that implementation.

CVSS severity9.8
Critical
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in ActiveReports.NET 18.1.1 allows remote attackers to execute code through TypeResolutionService. TypeResolutionService accepts user-supplied data without adequate validation and deserializes it, allowing attacker-controlled content to run in the current process. Exploitation requires an application workflow to pass attacker-controlled data to the library, and the reachable vector depends on that implementation.

The record

CVE
CVE-2025-6811
Published
Jul 7, 2025
Updated
Jul 7, 2025
Vendor
MESCIUS
Product
ActiveReports.NET
Classifications
CWE-502
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 2025Record 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=18.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MESCIUS · ActiveReports.NETversion=18.1.1

Published CVSS scores

9.8Zero Day InitiativeCVSS:3.0/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

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Technologies

Your stack

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Your stack

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