CVE-2020-13595

Name: CVE-2020-13595
Creator: NVD / NIST
Published: 2020-08-31T15:15:10.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.87%

Last modified Jun 17, 2026

CVE-2020-13595 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.0 through 4.2 (for ESP32 devices) returns the wrong number of completed BLE packets and triggers a reachable assertion on the host stack when receiving a packet with an MIC failure. An attacker within radio range can silently trigger the assertion (which disables the target's BLE stack) by sending a crafted sequence of BLE packets.. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

Description

The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.0 through 4.2 (for ESP32 devices) returns the wrong number of completed BLE packets and triggers a reachable assertion on the host stack when receiving a packet with an MIC failure. An attacker within radio range can silently trigger the assertion (which disables the target's BLE stack) by sending a crafted sequence of BLE packets.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.87%

54.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Espressif	Esp-Idf	>= 4.0.0, <= 4.2

References

https://asset-group.github.io/cves.htmlThird Party Advisory
https://asset-group.github.io/disclosures/sweyntooth/Third Party Advisory
https://github.com/espressif/esp32-bt-libThird Party Advisory
https://asset-group.github.io/cves.htmlThird Party Advisory
https://asset-group.github.io/disclosures/sweyntooth/Third Party Advisory
https://github.com/espressif/esp32-bt-libThird Party Advisory

Timeline

Published: Aug 31, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13595?

How severe is CVE-2020-13595?

CVE-2020-13595 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13595?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13595?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST