# CVE-2025-20702 — Airoha Technology Corp. AB156x, AB157x, AB158x, AB159x series, AB1627

> As of 2026-02-26, CVE-2025-20702 is a HIGH-severity vulnerability in Airoha Technology Corp. AB156x, AB157x, AB158x, AB159x series, AB1627, CVSS v3.1 8.8, EPSS 5.1% (91.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2025-20702, most recently “Airoha Bluetooth SoC Authentication Bypass & RACE Protocol Abuse (CVE-2025-20700/20701/20702) Enables Microphone Eavesdropping and Connection Hijacking on Beats Studio Buds and 28+ Headphone Models”.

**Last updated:** 2026-02-26

## What is CVE-2025-20702?

In the Airoha Bluetooth audio SDK, there is a possible unauthorized access to the RACE protocol. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

The record classifies CVE-2025-20702 under weakness class [CWE-306](https://intel.threadlinqs.com/cwe/CWE-306). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 427 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 5.1% probability of exploitation in the next 30 days, higher than 91.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 8.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2025-08-04, last modified 2026-02-26

## Is CVE-2025-20702 being exploited?

No public exploitation evidence for CVE-2025-20702 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-02-26. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Airoha Technology Corp.**: AB156x, AB157x, AB158x, AB159x series, AB1627

## How to fix CVE-2025-20702

No vendor patch reference has been recorded for CVE-2025-20702 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2025-20702

1 tracked threat in the Threadlinqs corpus references CVE-2025-20702, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Airoha Bluetooth SoC Authentication Bypass & RACE Protocol Abuse (CVE-2025-20700/20701/20702) Enables Microphone Eavesdropping and Connection Hijacking on Beats Studio Buds and 28+ Headphone Models](https://intel.threadlinqs.com/threat/TL-2026-0850) — HIGH · 2026-06-18

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-25. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [airoha.com](https://www.airoha.com/product-security-bulletin/2025)

Canonical: https://intel.threadlinqs.com/cve/CVE-2025-20702
Full detection coverage and IOCs for threats exploiting CVE-2025-20702 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp