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 mo. modified 2026-10-06 last mo. also EUVD-2026-92786

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

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CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: last mo. (2026-10-06)

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

threadpoolx.gitbook.io https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/missing-firmware-encryption-and-secure-boot-mechanisms referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

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

References

Sources

CVE List CVE-2026-78860
NVD CVE-2026-78860

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