CVE-2021-26603
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 · uneditedA heap overflow issue was found in ARK library of bandisoft Co., Ltd when the Ark_DigPathA function parsed a file path. This vulnerability is due to missing support for string length check.
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 · high confidenceHeap overflow vulnerability in the Ark_DigPathA function of Bandisoft's ARK library due to missing string length validation when parsing file paths. An attacker can craft a malicious file path that exceeds expected buffer boundaries, leading to heap memory corruption and potential code execution.
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< 7.13.0.3CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 if Bandisoft Ark Library is installedSearch the system for files or libraries named 'ark.dll', 'Bandisoft Ark', or similar Ark library components. Check installation directories of Bandisoft products or any third-party software that may bundle the Ark library.Affected if The Ark Library files are found on the system
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Determine the installed version of the Ark LibraryLocate the Ark library file (typically a DLL) and check its version information through file properties or version query tools. Look for version metadata embedded in the binary.Affected if The version is lower than 7.13.0.3
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Verify the Ark_DigPathA function is in useIdentify applications or components that link against or load the Ark library. Check application dependencies or import tables for references to Ark_DigPathA function.Affected if Applications use the Ark_DigPathA function from the library
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Check if file paths are processed through the vulnerable functionReview application logs, behavior monitoring, or code analysis to determine whether the Ark_DigPathA function is called with file path inputs, particularly from external or untrusted sources.Affected if The function processes file paths, especially from external or user-supplied input
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Monitor for heap corruption indicatorsUse memory diagnostic tools or debuggers to observe heap behavior when file path operations occur through the Ark_DigPathA function. Look for abnormal heap allocations or memory corruption patterns.Affected if Heap corruption or abnormal memory behavior is observed during file path processing
A system is affected if the Bandisoft Ark Library version is lower than 7.13.0.3 and applications use the Ark_DigPathA function to process file paths, which can trigger the heap overflow.
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 · scoped7.13.0.3
Implement proper string length validation before path parsing operations. Ensure buffers are correctly allocated with appropriate size limits and use safe string handling functions that respect buffer boundaries.
7.13.0.3
- Upgrade the Ark Library to version 7.13.0.3 or later
- Verify that the Ark_DigPathA function properly handles string length checks after upgrade
- Test the application to confirm the heap overflow vulnerability is resolved
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-26603 — 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-2021-26603 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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