CVE-2021-28136 is a medium-severity vulnerability affecting Espressif ESP-IDF 4.4 and earlier, specifically impacting ESP32 devices. It allows an attacker within radio range to trigger memory corruption and device crashes during Bluetooth Classic pairing by replaying duplicated LMP IO Capability Request packets. The CVSS score of 6.5 indicates a network-adjacent attack with low complexity and high availability impact, but no confidentiality or integrity impact. There is no known active exploitation, public exploit code, or Metasploit modules, though it has received some community discussion and media coverage as part of the broader "BrakTooth" vulnerabilities.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.4CPE matchmatch criteria | cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.