Is CVE-2025-57767 in the CISA KEV catalog?

No. CVE-2025-57767 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-57767?

CVE-2025-57767 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2025-57767?

CVE-2025-57767 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-57767?

Upgrade asterisk on debian unstable to 1:22.5.2~dfsg+~cs6.15.60671435-1 or later.

CVE & CISA-KEV Catalog

CVE-2025-57767

HIGH

7.5

CVSS v3

NVD

Description

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 response's WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn't being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.

CWE-253

How to fix

Remediation Available

asteriskDebian

Fixed in:1:22.5.2~dfsg+~cs6.15.60671435-1CVE-2025-57767

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Patch2

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-253 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-49286	High	8.6	10%	-	Fix
CVE-2017-7474	Critical	9.8	2.5%	-	-
CVE-2024-43521	High	7.5	2.4%	-	Fix
CVE-2020-6107	Medium	5.5	1.5%	-	Fix
CVE-2022-24880	Medium	5.3	1.2%	-	Fix
CVE-2023-24487	Medium	6.3	1.1%	-	Fix

Embed a live status badge for CVE-2025-57767

Markdown

[![CVE-2025-57767](https://tridentstack.com/cve/badge/CVE-2025-57767.svg)](https://tridentstack.com/cve/CVE-2025-57767)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-57767"><img src="https://tridentstack.com/cve/badge/CVE-2025-57767.svg" alt="CVE-2025-57767"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-20.