CVE-2020-12858Network attack vector

Remote device re-identification via stale beacon randomness

Published May 18, 2020 · Updated Aug 4, 2024

COVIDSafe v1.0.15 and v1.0.16 allow remote attackers to re-identify Android devices through scanned advertising beacons. The advertising payload fails to reinitialize random data, so repeated beacon values persistently link broadcasts to the same device. Scanning proximity beacons is sufficient; the disclosed impact is indirect confidentiality loss without integrity or availability effects.

CVSS severity7.5
High
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

COVIDSafe v1.0.15 and v1.0.16 allow remote attackers to re-identify Android devices through scanned advertising beacons. The advertising payload fails to reinitialize random data, so repeated beacon values persistently link broadcasts to the same device. Scanning proximity beacons is sufficient; the disclosed impact is indirect confidentiality loss without integrity or availability effects.

The record

CVE
CVE-2020-12858
Published
May 18, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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