How severe is CVE-2021-33498?

CVE-2021-33498 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-2021-33498 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33498?

CVE-2021-33498 affects Pexip Infinity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33498?

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.

When was CVE-2021-33498 published?

CVE-2021-33498 was published on 2022-01-15 and last updated on 2026-06-17.

CVE-2021-33498

CVE-2021-33498 is a high-severity vulnerability in 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Pexip Infinity
Published: 2022-01-15
Last modified: 2026-06-17

Description

Pexip Infinity before 26 allows remote denial of service because of missing H.264 input validation (issue 1 of 2).

Frequently asked questions

What is CVE-2021-33498?: Pexip Infinity before 26 allows remote denial of service because of missing H.264 input validation (issue 1 of 2).
How severe is CVE-2021-33498?: CVE-2021-33498 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-2021-33498 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33498?: CVE-2021-33498 affects Pexip Infinity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33498?: 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.
When was CVE-2021-33498 published?: CVE-2021-33498 was published on 2022-01-15 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:pexip:infinity:*:*:*:*:*:*:*:*

More vulnerabilities in Pexip Infinity

CVE-2021-42555 — High (CVSS 7.5): Pexip Infinity before 26.2 allows temporary remote Denial of Service (abort) because of missing call-setup input…
CVE-2021-35969 — High (CVSS 7.5): Pexip Infinity before 26 allows temporary remote Denial of Service (abort) because of missing call-setup input…
CVE-2021-33499 — High (CVSS 7.5): Pexip Infinity before 26 allows remote denial of service because of missing H.264 input validation (issue 2 of 2).
CVE-2021-32545 — High (CVSS 7.5): Pexip Infinity before 26 allows remote denial of service because of missing RTMP input validation.

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