KEV · Actively exploited

CVE-2024-39891

CVE-2024-39891 is actively exploited (CISA KEV catalog) : medium severity (CVSS 5.3), 2 tracked apps concerned, none still exposed on their current version.

Severity (CVSS): 5.3
Exploitation: Confirmed
Tracked apps: 2
Still exposed: 0

Published on 2024-07-02

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.)

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

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

EPSS 1.67% predictive model; CISA confirms active exploitation percentile 75.8%

CISA Known Exploited Vulnerability

Added to KEV: 2024-07-23
Remediation deadline: 2024-08-13
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware: Unknown (not documented by CISA)

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Authy iOS ios:com.authy.authy

Affected <26.1.0 Fixed in 26.1.0 Latest tracked - undetermined
Twilio Authy Authenticator Android com.authy.authy

Affected <25.1.0 Fixed in 25.1.0 Latest tracked 27.7.0 patched

Observed affected builds (9)

24.13.7 24.13.6 24.13.5 24.10.0 24.8.7 24.8.5 24.8.2 23.9.2 23.9.1

Vulnerable CPE configurations (2)

Vendor	Product	Platform	Versions	CPE 2.3 URI
twilio	authy iOS	iOS	<26.1.0	cpe:2.3:a:twilio:authy::::::iphone_os::*
twilio	authy_authenticator Android	Android	<25.1.0	cpe:2.3:a:twilio:authy_authenticator::::::android::*

View on NVD ↗ CISA KEV catalog ↗

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