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CVE-2020-12856

27
FAUCET Score

CVE-2020-12856 describes a critical vulnerability in OpenTrace, impacting COVIDSafe, TraceTogether, ABTraceTogether, and other applications across iOS and Android. The flaw stems from how Bluetooth is utilized, enabling remote attackers to perform long-term re-identification attacks and potentially other unspecified impacts. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network with low attack complexity, leading to high impacts on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity landscape.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:alberta:abtracetogether:-:*:*:*:*:android:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:alberta:abtracetogether:-:*:*:*:*:iphone_os:*:*
<= 1.0.17CPE matchmatch criteria
cpe:2.3:a:health:covidsafe:*:*:*:*:*:android:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:health:covidsafe:-:*:*:*:*:iphone_os:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:tracetogether:tracetogether:-:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.14%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0514 is in the 86th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

covidsafe.watch / issue-register/cve-2020-12856-long-term-tracking-and-possibly-enables-other-bluetooth-based-attack-vectors
Third Party Advisory
docs.google.com / document/d/1u5a5ersKBH6eG362atALrzuXo3zuZ70qrGomWVEC27U/edit
Third Party Advisory
github.com / alwentiu/COVIDSafe-CVE-2020-12856/blob/master/README.md
Third Party Advisory