CVE-2026-78862CWE-1299

CVE-2026-78862

Medium · published October 6, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
6.6
In the wild
Unconfirmed
What it is

An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via the UART serial interface on the printed circuit board (PCB)

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00175 · 6.6th percentile
Weakness
CWE-1299 · Missing Protection Mechanism for Alternate Hardware Interface
Published
2026-10-06T00:17Z
References (4)
http://ac12.com · [email protected]http://mercusys.com · [email protected]https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/unprotected-physical-debug-interface-uart · [email protected]https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/unprotected-physical-debug-interface-uart · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 07 OCT 03:42Z
    EPSS moved — → 0%
    epss
  • 05 OCT 00:00Z
    An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via the UART serial interface on the printed circuit board (PCB)
    cvelistv5