Which versions of Windows are affected by CVE-2025-34324?

CVE-2025-34324 presents moderate security risk, a signature bypass vulnerability rated CVSS 7.0. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2025-34324?

Yes, a public proof-of-concept exploit is available for CVE-2025-34324. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-34324?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Windows CVE-2025-34324

Q: What is the CVSS score of CVE-2025-34324?

CVE-2025-34324 has a CVSS 4.0 base score of 7.0 (High). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

HIGH

Improper Verification of Cryptographic Signature (CWE-347)

2025-11-18 disclosure@vulncheck.com

Windows RCE Apple macOS Microsoft Jwt Attack Gosign

7.0

CVSS 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

PoC Detected

Dec 31, 2025 - 02:19 vuln.today

Public exploit code

CVE Published

Nov 18, 2025 - 17:16 nvd

HIGH 7.0

DescriptionNVD

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel. In affected versions, TLS certificate validation can be disabled when a proxy is configured, allowing an attacker who can intercept network traffic to supply a malicious update manifest and corresponding package with a matching hash. This can cause the client to download and install a tampered update, resulting in arbitrary code execution with the privileges of the GoSign Desktop user on Windows and macOS, or with elevated privileges on some Linux deployments. A local attacker who can modify proxy settings may also abuse this behavior to escalate privileges by forcing installation of a crafted update.

AnalysisAI

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. Rated high severity (CVSS 7.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-347. GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel. In affected versions, TLS certificate validation can be disabled when a proxy is configured, allowing an attacker who can intercept network traffic to supply a malicious update manifest and corresponding package with a matching hash. This can cause the client to download and install a tampered update, resulting in arbitrary code execution with the privileges of the GoSign Desktop user on Windows and macOS, or with elevated privileges on some Linux deployments. A local attacker who can modify proxy settings may also abuse this behavior to escalate privileges by forcing installation of a crafted update. Affected products include: Infocert Gosign.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.