How severe is CVE-2025-6811?

CVE-2025-6811 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-6811 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6811?

CVE-2025-6811 affects Mescius Activereports.net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6811?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-6811 have an EU (EUVD) identifier?

Yes. CVE-2025-6811 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20247.

When was CVE-2025-6811 published?

CVE-2025-6811 was published on 2025-07-07 and last updated on 2026-06-17.

CVE-2025-6811

CVE-2025-6811 is a critical-severity vulnerability in Mescius Activereports.net with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20247
Weakness: CWE-502
Affected product: Mescius Activereports.net
Published: 2025-07-07
Last modified: 2026-06-17

Description

Mescius ActiveReports.NET TypeResolutionService Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mescius ActiveReports.NET. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the TypeResolutionService class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25397.

Frequently asked questions

What is CVE-2025-6811?: Mescius ActiveReports.NET TypeResolutionService Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mescius ActiveReports.NET. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the TypeResolutionService class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25397.
How severe is CVE-2025-6811?: CVE-2025-6811 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-6811 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6811?: CVE-2025-6811 affects Mescius Activereports.net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6811?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-6811 have an EU (EUVD) identifier?: Yes. CVE-2025-6811 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20247.
When was CVE-2025-6811 published?: CVE-2025-6811 was published on 2025-07-07 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-25-449/

Affected products (1)

cpe:2.3:a:mescius:activereports.net:18.1.1:*:*:*:*:*:*:*

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