HOMEVULNERABILITIESCVE-2020-15509
MEDIUM

CVE-2020-15509

CWE-319Published: July 7, 2020· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

Nordic Semiconductor Android BLE Library through 2.2.1 and DFU Library through 1.10.4 for Android (as used by nRF Connect and other applications) can engage in unencrypted communication while showing the user that the communication is purportedly encrypted. The problem is in bond creation (e.g., internalCreateBond in BleManagerHandler).

NVD Source

Technical Analysis

CVE-2020-15509 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

nordicsemi2 product(s)
android ble librarydfu library
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/NordicSemiconductor/Android-BLE-Library/commits/master
PATCHhttps://github.com/NordicSemiconductor/Android-DFU-Library/commits/release
PATCHhttps://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/
PATCHhttps://github.com/NordicSemiconductor/Android-BLE-Library/commits/master
PATCHhttps://github.com/NordicSemiconductor/Android-DFU-Library/commits/release
PATCHhttps://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/

All References (6)

→
https://github.com/NordicSemiconductor/Android-BLE-Library/commits/masterPatch · Third Party Advisory
→
https://github.com/NordicSemiconductor/Android-DFU-Library/commits/releasePatch · Third Party Advisory
→
https://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/Patch · Third Party Advisory
→
https://github.com/NordicSemiconductor/Android-BLE-Library/commits/masterPatch · Third Party Advisory
→
https://github.com/NordicSemiconductor/Android-DFU-Library/commits/releasePatch · Third Party Advisory
→
https://secretdiary.ninja/index.php/2020/07/03/norec-attack-stripping-ble-encryption-from-nordicsemis-android-library-cve-2020-15509/Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-15509
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-319
CISA KEVNo
Affected1 vendor(s)
PublishedJul 7, 2020

Related CVEs (CWE-319)

CVE-2025-4378
10.0
CVE-2025-47419
10.0
CVE-2018-8855
9.8
CVE-2019-5505
9.8
CVE-2017-15999
9.8
CVE-2018-11749
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15509 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2020-15509·NVD