What’s Vulnerable › Vulnerabilities

CVE-2020-5753

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-20 · updated 2026-06-17
• Weakness: CWE-670

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.

Affected products

• Signal Private Messenger: through 4.59.0
• Signal: through 3.8.1.5

References

• https://www.tenable.com/security/research/tra-2020-33
• https://www.tenable.com/security/research/tra-2020-33

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