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Critical severity9.9NVD Advisory· Published Apr 20, 2026· Updated Apr 22, 2026

CVE-2026-6643

CVE-2026-6643

Description

A stack-based buffer overflow vulnerability was found in the VPN Clients on the ADM. The issue stems from the use of unbounded sscanf() and passing user-controlled data directly to printf(). Due to the lack of PIE and Stack Canary protections, an authenticated remote attacker can exploit these to execute arbitrary code as the web server user. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Asustor/Data Master
    cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*
    Range: >=4.1.0.rhu2,<4.3.3.RR42
  • Asustor/Admllm-create
    Range: >=4.1.0 <=4.3.3.RR42 || >=5.0.0 <=5.0 <=5.1.2.REO1

Patches

Vulnerability mechanics

References

1

News mentions

0

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CVE-2026-6643 · Critical · VYPR