CVE-2026-6643CRITICAL 9.9EPSS p36.8%
CVE-2026-6643CVE-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.
Scoring
| CVSS 3.1 | 9.9 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 0.47% probability of exploitation · percentile 36.8% · 2026-06-18T12:00:27Z |
| Published | 2026-04-20 |
| Last modified | 2026-04-22 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Stack-based Buffer Overflowcwe-121 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.