How severe is CVE-2025-49832?

CVE-2025-49832 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-49832 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-49832?

CVE-2025-49832 primarily affects Sangoma Asterisk. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-49832?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-49832 have an EU (EUVD) identifier?

Yes. CVE-2025-49832 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23381.

When was CVE-2025-49832 published?

CVE-2025-49832 was published on 2025-08-01 and last updated on 2026-06-17.

CVE-2025-49832

CVE-2025-49832 is a medium-severity vulnerability in Sangoma Asterisk with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23381
Weakness: CWE-476
Affected product: Sangoma Asterisk
Published: 2025-08-01
Last modified: 2026-06-17

Description

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 `asterisk/res/res_stir_shaken /verification.c` 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.

Frequently asked questions

What is CVE-2025-49832?: 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 `asterisk/res/res_stir_shaken /verification.c` 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.
How severe is CVE-2025-49832?: CVE-2025-49832 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-49832 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-49832?: CVE-2025-49832 primarily affects Sangoma Asterisk. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-49832?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-49832 have an EU (EUVD) identifier?: Yes. CVE-2025-49832 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23381.
When was CVE-2025-49832 published?: CVE-2025-49832 was published on 2025-08-01 and last updated on 2026-06-17.

References

https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr

Affected products (10)

cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:*

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