How severe is CVE-2020-24655?

CVE-2020-24655 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-24655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24655?

CVE-2020-24655 affects Twilio Authy 2-factor Authentication. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-24655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-24655 published?

CVE-2020-24655 was published on 2020-09-10 and last updated on 2026-06-17.

CVE-2020-24655

CVE-2020-24655 is a medium-severity vulnerability in Twilio Authy 2-factor Authentication with a CVSS 3.x base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: Medium (CVSS 3.x base score 5.1)
CVSS v2: 1.9
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Twilio Authy 2-factor Authentication
Published: 2020-09-10
Last modified: 2026-06-17

Description

A race condition in the Twilio Authy 2-Factor Authentication application before 24.3.7 for Android allows a user to potentially approve/deny an access request prior to unlocking the application with a PIN on older Android devices (effectively bypassing the PIN requirement).

Frequently asked questions

What is CVE-2020-24655?: A race condition in the Twilio Authy 2-Factor Authentication application before 24.3.7 for Android allows a user to potentially approve/deny an access request prior to unlocking the application with a PIN on older Android devices (effectively bypassing the PIN requirement).
How severe is CVE-2020-24655?: CVE-2020-24655 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-24655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24655?: CVE-2020-24655 affects Twilio Authy 2-factor Authentication. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-24655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-24655 published?: CVE-2020-24655 was published on 2020-09-10 and last updated on 2026-06-17.

References

https://www.twilio.com/changelog

Affected products (1)

cpe:2.3:a:twilio:authy_2-factor_authentication:24.3.7:*:*:*:*:android:*:*

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