How to fix 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.

CVE-2025-66956

CRITICAL

2026-03-11 [email protected]

9.9

CVSS 3.1

CVSS Vector

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

Analysis Generated

Mar 12, 2026 - 22:07 vuln.today

CVE Published

Mar 11, 2026 - 21:16 nvd

CRITICAL 9.9

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.

Analysis

Insecure access control in Asseco SEE Live 2.0. Remote access to attachments.

Technical Context

CWE-284.

Affected Products

['Asseco SEE Live 2.0']

Remediation

Apply patch.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +50

POC: 0

CVE-2025-66956 vulnerability details – vuln.today

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CVE-2025-66956

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

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CVE-2025-66956

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

Share

External POC / Exploit Code