ZDF
Sign inSign up

Vulnerabilities

Security fix · CVE-2025-49832

Asterisk is an open source private branch exchange and telephony toolkit.

Published Aug 1, 2025 · catalog updated Aug 1, 2025 · Asterisk is an open

Last checked Oct 23, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-49832. EPSS is 0.49%. Act only if a listed version of Asterisk is an open is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Asterisk is an open).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.49%
Remediation
Version ranges on file
Affected products
vendor asterisk asterisk 20.7-cert6, < 20.7-cert7

Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor asterisk asterisk 20.7-cert6, < 20.7-cert720.7-cert6, < 20.7-cert7

How to fix CVE-2025-49832

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-49832. EPSS is 0.49%. Act only if a listed version of Asterisk is an open is installed.

Which versions are affected?

Compare what you have installed with asterisk asterisk 20.7-cert6, < 20.7-cert7 20.7-cert6, < 20.7-cert7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.49%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 1, 2025 · EUVD

    Detected

    Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated wit

  2. Aug 1, 2025 · EUVD

    Updated

    Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated wit

Sources

  • CVE.orgVulnerability recordCVE-2025-49832

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-49832

    30-day exploitation probability 0.49%

    first.org
  • EUVDVulnerability recordEUVD-2025-23381

    Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in that can be exploited when an attacker

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026