MEDIUM CISA KEV

CVE-2024-39891

CVSS v3

5.3

MEDIUM

EPSS Score

29.6%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

SSVC status

Description

In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)

CISA Known Exploited Vulnerability

Date Added
7/23/2024
Patch Due Date
8/13/2024
Ransomware Use
Unknown

Technical details

Published
7/2/2024

Frequently asked questions

What is CVE-2024-39891?

In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)

Is CVE-2024-39891 actively exploited?

Yes. CVE-2024-39891 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 8/13/2024.

What is the CVSS score for CVE-2024-39891?

CVE-2024-39891 has a CVSS v3 base score of 5.3 (MEDIUM severity).

Is CVE-2024-39891 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.