What is the CVSS score of CVE-2025-66956?

CVE-2025-66956 has a CVSS 3.1 base score of 9.9 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Contact Plan are affected by CVE-2025-66956?

A critical vulnerability in Asseco SEE Live 2.0 allows unauthenticated remote attackers to access and execute attachments through manipulated URLs, potentially enabling unauthorized data exfiltration…

How to fix or mitigate CVE-2025-66956?

Within 24 hours: Disable contact plan, email, SMS, and fax attachment functionality if operationally feasible; isolate affected systems from internet-facing access; inventory all instances of Asseco SEE Live 2.0 in your environment. Within 7 days: Implement network segmentation to restrict access to affected systems; deploy WAF rules to block suspicious URL patterns targeting attachment handlers; review logs for exploitation attempts. Within 30 days: Contact Asseco for patch ETA and interim security updates; evaluate alternative solutions; conduct forensic analysis of affected systems for breach indicators.

Contact Plan CVE-2025-66956

CRITICAL

Improper Access Control (CWE-284)

2026-03-11 cve@mitre.org

Authentication Bypass

9.9

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

9.9 CRITICAL

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 27, 2026 - 19:22 vuln.today

cvss_changed

Analysis Generated

Mar 12, 2026 - 22:07 vuln.today

CVE Published

Mar 11, 2026 - 21:16 nvd

CRITICAL 9.9

DescriptionCVE.org

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.