CVE-2020-5753

Name: CVE-2020-5753
Creator: NVD / NIST
Published: 2020-05-20T14:15:11.673+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2020-5753 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Signal Private Messenger Android v4.59.0 and up and iOS v3.8.1.5 and up allows a remote non-contact to ring a victim's Signal phone and disclose currently used DNS server due to ICE Candidate handling before call is answered or declined.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

Signal Private Messenger Android v4.59.0 and up and iOS v3.8.1.5 and up allows a remote non-contact to ring a victim's Signal phone and disclose currently used DNS server due to ICE Candidate handling before call is answered or declined.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.07%

60.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-670

Affected Software

Vendor	Product	Versions
Signal	Private Messenger	<= 4.59.0
Signal	Signal	<= 3.8.1.5

References

https://www.tenable.com/security/research/tra-2020-33Third Party Advisory
https://www.tenable.com/security/research/tra-2020-33Third Party Advisory

Timeline

Published: May 20, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5753?

How severe is CVE-2020-5753?

CVE-2020-5753 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5753?

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-2020-5753?

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

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Source: NVD / NIST