What is CVE-2026-78860?

CVE-2026-78860 is a high-severity vulnerability in N/a, classified under Missing Encryption of Sensitive Data. CVSS score: 7.8/10. Published 2026-10-05.

How severe is CVE-2026-78860?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in N/a

CVE-2026-78860

An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via the storage of information in plaintext

Published 2026-10-05 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-311 — Missing Encryption of Sensitive Data
CWE-347 — Improper Verification of Cryptographic Signature

References

mercusys.com
threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/missing-firm…

Frequently asked questions

What is CVE-2026-78860?: CVE-2026-78860 is a high-severity vulnerability in N/a, classified under Missing Encryption of Sensitive Data. CVSS score: 7.8/10. Published 2026-10-05.
How severe is CVE-2026-78860?: High severity. CVSS v3 base score is 7.8 out of 10.