What is CVE-2021-26603?

CVE-2021-26603 is a high-severity vulnerability in Bandisoft Ark, classified under Heap-based Buffer Overflow. CVSS score: 8.6/10. Published 2021-09-09.

How severe is CVE-2021-26603?

High severity. CVSS v3 base score is 8.6 out of 10.

Buffer overflow in Bandisoft Ark

CVE-2021-26603

A 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.

Vulnerability class: Buffer Overflow

Published 2021-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

References

www.boho.or.kr/krcert/secNoticeView.do (Third Party Advisory)

Frequently asked questions

What is CVE-2021-26603?: CVE-2021-26603 is a high-severity vulnerability in Bandisoft Ark, classified under Heap-based Buffer Overflow. CVSS score: 8.6/10. Published 2021-09-09.
How severe is CVE-2021-26603?: High severity. CVSS v3 base score is 8.6 out of 10.