CVE-2026-78861CWE-789

CVE-2026-78861

High · published October 6, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
2.8
In the wild
Unconfirmed
What it is

An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via a hardcoded 512-bit RSA Private Key

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00136 · 2.8th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
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/hardcoded-private-key · [email protected]https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/hardcoded-private-key · 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 a hardcoded 512-bit RSA Private Key
    cvelistv5