CVE-2021-24027

Name: CVE-2021-24027
Creator: NVD / NIST
Published: 2021-04-06T17:15:12.977+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.81%

Last modified Jun 17, 2026

CVE-2021-24027 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A cache configuration issue prior to WhatsApp for Android v2.21.4.18 and WhatsApp Business for Android v2.21.4.18 may have allowed a third party with access to the device’s external storage to read cached TLS material.. EPSS estimates a 3.81% chance of exploitation in the next 30 days.

Description

A cache configuration issue prior to WhatsApp for Android v2.21.4.18 and WhatsApp Business for Android v2.21.4.18 may have allowed a third party with access to the device’s external storage to read cached TLS material.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.81%

88.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-524

Affected Software

Vendor	Product	Versions
Whatsapp	Whatsapp	< 2.21.4.18
Whatsapp	Whatsapp Business	< 2.21.4.18

References

https://www.whatsapp.com/security/advisories/2021/Vendor Advisory
https://www.whatsapp.com/security/advisories/2021/Vendor Advisory

Timeline

Published: Apr 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24027?

How severe is CVE-2021-24027?

CVE-2021-24027 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24027?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24027?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST