What’s Vulnerable › Vulnerabilities

CVE-2020-12856

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-18 · updated 2026-06-17

Description

OpenTrace, as used in COVIDSafe through v1.0.17, TraceTogether, ABTraceTogether, and other applications on iOS and Android, allows remote attackers to conduct long-term re-identification attacks and possibly have unspecified other impact, because of how Bluetooth is used.

Affected products

• Alberta Abtracetogether: all versions
• Health Covidsafe: through 1.0.17
• Tracetogether: all versions

References

• https://covidsafe.watch/issue-register/cve-2020-12856-long-term-tracking-and-possibly-enables-other-bluetooth-based-attack-vectors
• https://docs.google.com/document/d/1u5a5ersKBH6eG362atALrzuXo3zuZ70qrGomWVEC27U/edit?usp=sharing
• https://github.com/alwentiu/COVIDSafe-CVE-2020-12856/blob/master/README.md
• https://covidsafe.watch/issue-register/cve-2020-12856-long-term-tracking-and-possibly-enables-other-bluetooth-based-attack-vectors
• https://docs.google.com/document/d/1u5a5ersKBH6eG362atALrzuXo3zuZ70qrGomWVEC27U/edit?usp=sharing
• https://github.com/alwentiu/COVIDSafe-CVE-2020-12856/blob/master/README.md

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