How severe is CVE-2025-66956?

CVE-2025-66956 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66956 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66956?

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-2025-66956 have an EU (EUVD) identifier?

Yes. CVE-2025-66956 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208597.

When was CVE-2025-66956 published?

CVE-2025-66956 was published on 2026-03-11 and last updated on 2026-07-05.

CVE-2025-66956

CVE-2025-66956 is a critical-severity vulnerability with a CVSS 3.x base score of 9.9. 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-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208597
Weakness: CWE-284
Published: 2026-03-11
Last modified: 2026-07-05

Description

Insecure Access Control in Contact Plan, E-Mail, SMS and Fax components in Asseco SEE Live 2.0 allows remote attackers to access and execute attachments via a computable URL.

Frequently asked questions

What is CVE-2025-66956?: Insecure Access Control in Contact Plan, E-Mail, SMS and Fax components in Asseco SEE Live 2.0 allows remote attackers to access and execute attachments via a computable URL.
How severe is CVE-2025-66956?: CVE-2025-66956 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66956 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-66956?: 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-2025-66956 have an EU (EUVD) identifier?: Yes. CVE-2025-66956 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208597.
When was CVE-2025-66956 published?: CVE-2025-66956 was published on 2026-03-11 and last updated on 2026-07-05.

References

EU advisories (EUVD)

http://asseco.com

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