How severe is CVE-2025-66443?

CVE-2025-66443 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-66443 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66443?

CVE-2025-66443 affects Pexip Pexip Infinity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66443?

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-2025-66443 have an EU (EUVD) identifier?

Yes. CVE-2025-66443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205366.

When was CVE-2025-66443 published?

CVE-2025-66443 was published on 2025-12-25 and last updated on 2026-06-17.

CVE-2025-66443

CVE-2025-66443 is a high-severity vulnerability in Pexip Pexip Infinity with a CVSS 3.x base score of 7.5. 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-617.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205366
Weakness: CWE-617
Affected product: Pexip Pexip Infinity
Published: 2025-12-25
Last modified: 2026-06-17

Description

Pexip Infinity 35.0 through 38.1 before 39.0, in non-default configurations that use Direct Media for WebRTC, has Improper Input Validation in signalling that allows an attacker to trigger a software abort, resulting in a temporary denial of service.

Frequently asked questions

What is CVE-2025-66443?: Pexip Infinity 35.0 through 38.1 before 39.0, in non-default configurations that use Direct Media for WebRTC, has Improper Input Validation in signalling that allows an attacker to trigger a software abort, resulting in a temporary denial of service.
How severe is CVE-2025-66443?: CVE-2025-66443 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-66443 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66443?: CVE-2025-66443 affects Pexip Pexip Infinity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66443?: 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-2025-66443 have an EU (EUVD) identifier?: Yes. CVE-2025-66443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205366.
When was CVE-2025-66443 published?: CVE-2025-66443 was published on 2025-12-25 and last updated on 2026-06-17.

References

https://docs.pexip.com/admin/security_bulletins.htm

Affected products (1)

cpe:2.3:a:pexip:pexip_infinity:*:*:*:*:*:*:*:*

More vulnerabilities in Pexip Pexip Infinity

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CVE-2022-27933 — High (CVSS 8.2): Pexip Infinity before 27.3 allows remote attackers to trigger a software abort via One Touch Join.
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Other CWE-617 (Reachable Assertion) vulnerabilities

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CVE-2020-12417 — High (CVSS 8.8): Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in…
CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.

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