What is CVE-2025-57767?

CVE-2025-57767 is a high-severity vulnerability in Asterisk, classified under CWE-253. CVSS score: 7.5/10. Published 2025-08-28.

How severe is CVE-2025-57767?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-57767 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Asterisk

CVE-2025-57767

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 respons…

EPSS: 0.002 (36.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Asterisk — versions < 22.5.2, < 21.10.2, < 20.15.2

Weakness classification (CWE)

CWE-253

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/asterisk/asterisk/security/advisories/GHSA-64qc-9x89-rx5j (x_refsource_CONFIRM)
https://github.com/asterisk/asterisk/pull/1407 (x_refsource_MISC)
https://github.com/asterisk/asterisk/commit/02993717b08f899d4aca9888062f35dfb198584f (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-57767?: CVE-2025-57767 is a high-severity vulnerability in Asterisk, classified under CWE-253. CVSS score: 7.5/10. Published 2025-08-28.
How severe is CVE-2025-57767?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-57767 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.