CVE-2021-26603

Heap memory corruption via unchecked path length

Published Sep 9, 2021 · Updated Aug 3, 2024

Heap-based buffer overflow in Bandisoft ARK Library 7.13.0.3 allows local users to corrupt heap memory through a crafted file path. Ark_DigPathA parses the supplied path without checking its string length before writing to a heap buffer. User interaction is required in a Windows application embedding the library; the published record does not confirm code execution or a crash.

CVSS severity8.6
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Bandisoft ARK Library 7.13.0.3 allows local users to corrupt heap memory through a crafted file path. Ark_DigPathA parses the supplied path without checking its string length before writing to a heap buffer. User interaction is required in a Windows application embedding the library; the published record does not confirm code execution or a crash.

The record

CVE
CVE-2021-26603
Published
Sep 9, 2021
Updated
Aug 3, 2024
Vendor
Bandisoft International Inc.
Product
ARK Library
Classifications
CWE-787, CWE-122
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.13.0.3 <=7.13.0.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Bandisoft International Inc. · ARK Libraryversion=7.13.0.3 <=7.13.0.3

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.6KrCERT/CCCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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