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CVE-2025-47779

Sangoma Asterisk vulnerability

7.7 HIGHPublic exploitEPSS 0.51%
  1. Published22 May 2025

Description

Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, SIP requests of the type MESSAGE (RFC 3428) authentication do not get proper alignment. An authenticated attacker can spoof any user identity to send spam messages to the user with their authorization token. Abuse of this security issue allows authenticated attackers to send fake chat messages can be spoofed to appear to come from trusted entities. Even administrators who follow Security best practices and Security Considerations can be impacted. Therefore, abuse can lead to spam and enable social engineering, phishing and similar attacks. Versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk fix the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Affected products

Sangoma Asterisk≥ 20.0.0 < 20.14.1 · ≥ 21.0.0 < 21.9.1 · ≥ 22.0.0 < 22.4.1 · < 18.26.2
Sangoma Certified Asterisk< 18.9 · 18.9 · 20.7

Remediation

Fixed in
Sangoma Asterisk≥ 20.14.1
Sangoma Certified Asterisk≥ 18.9

References

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Frequently asked

Is CVE-2025-47779 being actively exploited?

CVE-2025-47779 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.51%.

How severe is CVE-2025-47779?

CVE-2025-47779 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.51% probability of exploitation.

Which products are affected by CVE-2025-47779?

Affected products include Sangoma Asterisk, Sangoma Certified Asterisk.

How do I fix CVE-2025-47779?

Upgrade affected software to a fixed version, for example Sangoma Asterisk 20.14.1, Sangoma Certified Asterisk 18.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-47779 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.