CVE-2025-66956Public exploitNetwork attack vector

Authenticated attachment execution via computable URLs

Published Mar 11, 2026 · Updated Mar 11, 2026

Improper access control in Asseco SEE Live 2.0 allows remote authenticated users to access and execute attachments via computable URLs. The Contact Plan, E-Mail, SMS, and Fax components store attachments under date-and-MD5-derived paths that remain directly web-accessible without an attachment-level authorization check. Low-privilege access is sufficient; server-executable attachments run in the web application context, while other attachments can be read directly.

CVSS severity9.9
Critical
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Asseco SEE Live 2.0 allows remote authenticated users to access and execute attachments via computable URLs. The Contact Plan, E-Mail, SMS, and Fax components store attachments under date-and-MD5-derived paths that remain directly web-accessible without an attachment-level authorization check. Low-privilege access is sufficient; server-executable attachments run in the web application context, while other attachments can be read directly.

The record

CVE
CVE-2025-66956
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8TheWoodenBenchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
10.0TheWoodenBenchCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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