CVE-2025-51726Public exploit

Malicious installer execution via weak signing and ASLR

Published Aug 4, 2025 · Updated Aug 5, 2025

Cryptographic weakness in CyberGhostVPNSetup.exe allows attackers to pass malicious installers off as signed software via forged SHA-1 chains. The Windows installer uses SHA-1 for code signing and omits High Entropy ASLR, leaving its signature susceptible to collision-based forgery and its load addresses predictable. Exploitation requires execution of a counterfeit installer on a Windows system without strict SmartScreen or trust-policy enforcement, granting malicious code the installation privileges available to that process.

CVSS severity8.4
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cryptographic weakness in CyberGhostVPNSetup.exe allows attackers to pass malicious installers off as signed software via forged SHA-1 chains. The Windows installer uses SHA-1 for code signing and omits High Entropy ASLR, leaving its signature susceptible to collision-based forgery and its load addresses predictable. Exploitation requires execution of a counterfeit installer on a Windows system without strict SmartScreen or trust-policy enforcement, granting malicious code the installation privileges available to that process.

The record

CVE
CVE-2025-51726
Published
Aug 4, 2025
Updated
Aug 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, T1553.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1553.002Subvert Trust Controls: Code Signing

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo