# Mercusys AC12 V2 vulnerabilities

Source: https://junglewise.ai/threats/technologies/ac12-v2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/ac12-v2.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Mercusys AC12 V2: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-78862, was published on 5 October 2026. Nothing in the last four weeks, down from 3 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About Mercusys AC12 V2

AC12 V2 dual-band wireless router by Mercusys for home and small office networking.

## Latest Mercusys AC12 V2 vulnerabilities

- [CVE-2026-78862: Mercusys AC12 V2 arbitrary code execution via UART interface](https://junglewise.ai/threats/cve-2026-78862-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)
- [CVE-2026-78861: Mercusys AC12 V2 hardcoded RSA private key code execution](https://junglewise.ai/threats/cve-2026-78861-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)
- [CVE-2026-78860: Mercusys AC12 V2 missing firmware encryption and secure boot](https://junglewise.ai/threats/cve-2026-78860-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)

## Most severe Mercusys AC12 V2 vulnerabilities

- [CVE-2026-78862: Mercusys AC12 V2 arbitrary code execution via UART interface](https://junglewise.ai/threats/cve-2026-78862-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)
- [CVE-2026-78861: Mercusys AC12 V2 hardcoded RSA private key code execution](https://junglewise.ai/threats/cve-2026-78861-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)
- [CVE-2026-78860: Mercusys AC12 V2 missing firmware encryption and secure boot](https://junglewise.ai/threats/cve-2026-78860-an-issue-in-mercusys-ac12-v2-allows-a-local-attacker-to-execute) (info, published 5 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 3 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 3 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Mercusys technologies

- [Mercusys AC12G(EU) V1](https://junglewise.ai/threats/technologies/ac12g-eu-v1): 12 vulnerabilities
- [Mercusys AC12G](https://junglewise.ai/threats/technologies/ac12g): 9 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Mercusys AC12 V2 vulnerabilities", https://junglewise.ai/threats/technologies/ac12-v2, 9 November 2026.