CVE-2025-47779Public exploitNetwork attack vector

Authenticated message spoofing via malformed From header

Published May 22, 2025 · Updated Nov 3, 2025

Improper SIP MESSAGE authentication in Asterisk allows remote authenticated users to spoof sender identities with malformed From headers. The PJSIP MESSAGE path treats the display name before a semicolon as the forwarded sender while digest authentication validates the URI username after it. A valid endpoint account and a dialplan that forwards MESSAGE(from) are required; exploitation injects deceptive chat messages without reading data or interrupting service.

CVSS severity7.7
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper SIP MESSAGE authentication in Asterisk allows remote authenticated users to spoof sender identities with malformed From headers. The PJSIP MESSAGE path treats the display name before a semicolon as the forwarded sender while digest authentication validates the URI username after it. A valid endpoint account and a dialplan that forwards MESSAGE(from) are required; exploitation injects deceptive chat messages without reading data or interrupting service.

The record

CVE
CVE-2025-47779
Published
May 22, 2025
Updated
Nov 3, 2025
Vendor
Asterisk
Product
Asterisk
Classifications
CWE-140, CWE-792, T1656
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 18.10, < 18.26.2
  2. Affected versionversion=< 18.9-cert14
  3. Affected versionversion=>= 20.0, < 20.7-cert5
  4. Affected versionversion=>= 20.8, < 20.14.1
  5. Affected versionversion=>= 21.0, < 21.9.1
  6. Affected versionversion=>= 22.0, < 22.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Asterisk · Asteriskversion=>= 18.10, < 18.26.2; version=< 18.9-cert14; version=>= 20.0, < 20.7-cert5; version=>= 20.8, < 20.14.1; version=>= 21.0, < 21.9.1; version=>= 22.0, < 22.4.1

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-140Improper Neutralization of Delimiters
CWE-792Incomplete Filtering of One or More Instances of Special Elements
T1656Impersonation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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