CISA KEV entry
CVE-2024-39891Twilio Authy Information Disclosure Vulnerability
Twilio Authy. Added to the CISA Known Exploited Vulnerabilities catalogue on 23 July 2024.
Data status: a source is stale
Last synced CISA catalogue version 2026.11.04 (released 4 November 2026) 1,768 entries Updated manually
- Date added
- 2024-07-23
- Federal due date
- 2024-08-13 21 days after it was added; passed at the sync of 2026-11-05
- Known ransomware use
- Unknown
- Forensic triage (BOD 26-04)
- No
- CVSS
- 5.3 Medium CVSS 3.1, scored by nvd@nist.gov
- EPSS
- 1.66% percentile 76.8, scored 2026-11-04
- CISA SSVC
- Exploitation active, automatable yes, technical impact partial
- NVD status
- Analyzed published 2024-07-02, 21 days before the KEV listing
BOD 26-04 remediation window
With CISA's SSVC answers for this CVE (automatable: yes, technical impact: partial), BOD 26-04 Table 1 gives 3 days on a publicly exposed asset (row 2) and 14 days on an asset that is not publicly exposed (row 10) S06. The catalogue due date, 21 days after the date added, was set before BOD 26-04 took effect on 10 June 2026 S06. The directive binds US federal civilian executive branch agencies only.
What CISA says
Short description
Twilio Authy contains an information disclosure vulnerability in its API that allows an unauthenticated endpoint to accept a request containing a phone number and respond with information about whether the phone number was registered with Authy.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://www.twilio.com/en-us/changelog/Security_Alert_Authy_App_Android_iOS; https://nvd.nist.gov/vuln/detail/CVE-2024-39891
CWE in the catalogue
CWE-203
Official links
- CISA KEV catalogue entry cisa.gov
- NVD record nvd.nist.gov
Vendor advisory and patch links
No vendor advisory linked by NVD.
Links in CISA's notes
NVD details
- CWE (NVD)
- CWE-203 by nvd@nist.gov
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- CVSS versions in NVD
- V31
- Last modified in NVD
- 2026-06-17T07:42:58.630
Where each value comes from
| Field | Source | Fetched, UTC | State |
|---|---|---|---|
| Catalogue fields | CISA KEV JSON, version 2026.11.04 | 2026-11-05 11:38 | current |
| NVD published, status, CVSS, CWE, vendor links | NVD CVE API 2.0; CVSS: NVD (nvd@nist.gov) | 2026-11-03 12:37 | current at 2026-11-05 11:38 |
| EPSS | FIRST EPSS API, scores of 2026-11-04 | 2026-11-05 11:38 | current |
| CISA SSVC | CISA ADP (via NVD), record of 2024-07-23 | 2026-11-03 12:37 | current |
This product uses data from the NVD API but is not endorsed or certified by the NVD. CISA does not endorse Sysprobs. Methodology.