CVE-2025-4125
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDelta Electronics ISPSoft version 3.20 is vulnerable to an Out-Of-Bounds Write vulnerability that could allow an attacker to execute arbitrary code when parsing ISP file.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceDelta Electronics ISPSoft version 3.20 is vulnerable to an out-of-bounds write vulnerability during ISP file parsing. An attacker can exploit this by crafting a malicious ISP file that triggers a buffer overflow, potentially leading to arbitrary code execution with the privileges of the application.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 3.21CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed ISPSoft versionOpen ISPSoft and navigate to Help > About, or check the application properties/version details in the Windows installation directoryAffected if The version shown is 3.20 or any version lower than 3.21
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Confirm ISP file parsing is in useDetermine if the system uses ISPSoft to open, import, or parse .isp project files from any sourceAffected if ISPSoft is actively used to process ISP files, as the vulnerability triggers during file parsing
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Check for untrusted ISP file sourcesReview where ISP files originate - check network shares, external devices, email attachments, or vendor-supplied files that may not be from trusted internal sourcesAffected if ISP files are obtained from untrusted or external sources, as the exploit requires a maliciously crafted ISP file
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Verify application privilegesCheck the user account context under which ISPSoft runs - look at the process properties or task managerAffected if ISPSoft runs with elevated privileges, as this increases the potential impact of arbitrary code execution
You are affected if ISPSoft version 3.20 or earlier is installed and the software is used to parse ISP files, particularly from untrusted sources, since the buffer overflow triggers during file parsing regardless of user interaction.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped3.21
Apply the vendor patch for ISPSoft v3.20 when released; until then, implement network isolation for affected systems and enforce strict validation of ISP files from untrusted sources.
ISPSoft 3.21
- Navigate to the official Delta Electronics support website (filecenter.deltaww.com or deltaww.com)
- Locate and download ISPSoft version 3.21 or later
- Back up all existing ISP project files and configurations before upgrading
- Uninstall the current ISPSoft version (3.20 or earlier)
- Install ISPSoft version 3.21 using the downloaded installer
- Verify successful installation by checking the software version in the application
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4125 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-4125 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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