CVE-2026-6643Disclosure(asustor / data_master)

LOWCVSS 9.9 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-121

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • data_master

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 3 classified signals
  • Peaked 1d ago at 2 mentions (2026-04-20); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
Products
data_master

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-20: 2Mentions · 2026-04-24: 1Technical Details · 2026-04-20: 204-2004-24
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-04-202
Disclosure2
2026-04-241
Disclosure1
Full discourse3 posts
  • CERT-PY@CERTpy
    Disclosure

    ⚠️ Vulnerabilidades en productos Asustor ❗ CVE-2026-6644 ❗ CVE-2026-6643 ➡️ Más info: https://www.cert.gov.py/vulnerabilidades-en-productos-asustor/ https://t.co/gZAb94BHJ4

    Post summary

    The post announces new CVE vulnerabilities (CVE‑2026‑6644 and CVE‑2026‑6643) affecting Asustor products, providing links for additional information.

    00000117
    6.7K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-6643 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… https://www.cve.org/CVERecord?id=CVE-2026-6643

    Post summary

    The text announces a stack-based buffer overflow vulnerability in VPN Clients, detailing its cause but giving no exploit code or patch information.

    00000123
    57.2K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-6643 Stack-Based Buffer Overflow in ADM VPN Client 4.1.0 Through 5.1.2 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-6643

    Post summary

    A stack‑based buffer overflow has been disclosed for ADM VPN Client 4.1.0 through 5.1.2 (CVE‑2026‑6643), but no exploitation or patch details are present.

    0000051
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
OSasustordata_master---

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