How severe is CVE-2023-26566?

CVE-2023-26566 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2023-26566 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-26566?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-26566 have an EU (EUVD) identifier?

Yes. CVE-2023-26566 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-30361.

When was CVE-2023-26566 published?

CVE-2023-26566 was published on 2024-05-14 and last updated on 2026-06-17.

CVE-2023-26566

CVE-2023-26566 is a high-severity vulnerability with a CVSS 3.x base score of 8.6. 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-798.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-30361
Weakness: CWE-798
Published: 2024-05-14
Last modified: 2026-06-17

Description

Sangoma FreePBX 1805 through 2203 on Linux contains hardcoded credentials for the Asterisk REST Interface (ARI), which allows remote attackers to reconfigure Asterisk and make external and internal calls via HTTP and WebSocket requests sent to the API.

Frequently asked questions

What is CVE-2023-26566?: Sangoma FreePBX 1805 through 2203 on Linux contains hardcoded credentials for the Asterisk REST Interface (ARI), which allows remote attackers to reconfigure Asterisk and make external and internal calls via HTTP and WebSocket requests sent to the API.
How severe is CVE-2023-26566?: CVE-2023-26566 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2023-26566 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-26566?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-26566 have an EU (EUVD) identifier?: Yes. CVE-2023-26566 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-30361.
When was CVE-2023-26566 published?: CVE-2023-26566 was published on 2024-05-14 and last updated on 2026-06-17.

References

https://qsecure.com.cy/resources/advisories/sangoma-freepbx-linux-hardcoded-credentials

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