SARA / Free Tools / CVE / CVE-2024-39891

CVE-2024-39891 — Twilio Authy Information Disclosure Vulnerability

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

CVSS
5.3 MEDIUM
EPSS
29.58% (top 3.40%)
CWE
Published
2024-07-02T00:00:00.000Z
Last modified
2025-10-21T22:55:50.240Z
CVSS vector
CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N
CISA KEV — Actively Exploited
Added to KEV
2024-07-23
BOD 22-01 due
2024-08-13
Ransomware use
Unknown

01What is this vulnerability?

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…

02Affected products

VendorProductVersions
na / n/an/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2024-07-23. Ransomware use: Unknown.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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