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CVE-2020-15802

19
FAUCET Score

CVE-2020-15802, known as BLURtooth, affects devices supporting Bluetooth before version 5.1, specifically impacting the Cross Transport Key Derivation in Bluetooth Core Specification v4.2 and v5.0. This medium-severity vulnerability (CVSS 5.9) allows unauthenticated man-in-the-middle (MITM) attacks by enabling an attacker to overwrite authenticated or high-entropy keys with unauthenticated or low-entropy keys. While there is no known public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness of its potential impact. It is not currently listed on CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.1CPE matchmatch criteria
cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.14%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0714 is in the 93rd percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2020-15802Moderate

hardware: BLURtooth: "Dual mode" hardware using CTKD are vulnerable to key overwrite

Sep 10, 2020

References

gizmodo.com / bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709
Third Party Advisory
bluetooth.com / learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth
Vendor Advisory
kb.cert.org / vuls/id/589825
Third Party AdvisoryUS Government Resource