How severe is CVE-2021-3033?

CVE-2021-3033 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-3033 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3033?

CVE-2021-3033 primarily affects Paloaltonetworks Prisma Cloud. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3033?

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

When was CVE-2021-3033 published?

CVE-2021-3033 was published on 2021-02-10 and last updated on 2026-06-17.

CVE-2021-3033

CVE-2021-3033 is a critical-severity vulnerability in Paloaltonetworks Prisma Cloud with a CVSS 3.x base score of 9.1. 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-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Paloaltonetworks Prisma Cloud
Published: 2021-02-10
Last modified: 2026-06-17

Description

An improper verification of cryptographic signature vulnerability exists in the Palo Alto Networks Prisma Cloud Compute console. This vulnerability enables an attacker to bypass signature validation during SAML authentication by logging in to the Prisma Cloud Compute console as any authorized user. This issue impacts: All versions of Prisma Cloud Compute 19.11, Prisma Cloud Compute 20.04, and Prisma Cloud Compute 20.09; Prisma Cloud Compute 20.12 before update 1. Prisma Cloud Compute SaaS version is not impacted by this vulnerability.

Frequently asked questions

What is CVE-2021-3033?: An improper verification of cryptographic signature vulnerability exists in the Palo Alto Networks Prisma Cloud Compute console. This vulnerability enables an attacker to bypass signature validation during SAML authentication by logging in to the Prisma Cloud Compute console as any authorized user. This issue impacts: All versions of Prisma Cloud Compute 19.11, Prisma Cloud Compute 20.04, and Prisma Cloud Compute 20.09; Prisma Cloud Compute 20.12 before update 1. Prisma Cloud Compute SaaS version is not impacted by this vulnerability.
How severe is CVE-2021-3033?: CVE-2021-3033 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-3033 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3033?: CVE-2021-3033 primarily affects Paloaltonetworks Prisma Cloud. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3033?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3033 published?: CVE-2021-3033 was published on 2021-02-10 and last updated on 2026-06-17.

References

https://security.paloaltonetworks.com/CVE-2021-3033

Affected products (10)

cpe:2.3:a:paloaltonetworks:prisma_cloud:19.11:-:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:19.11:update_1:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:19.11:update_2:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.04:-:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.04:update_1:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.04:update_2:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.09:-:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.09:update_1:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.09:update_2:*:*:compute:*:*:*
cpe:2.3:a:paloaltonetworks:prisma_cloud:20.12:-:*:*:compute:*:*:*

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