How severe is CVE-2021-3038?

CVE-2021-3038 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-3038 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3038?

CVE-2021-3038 affects Paloaltonetworks Globalprotect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3038?

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

When was CVE-2021-3038 published?

CVE-2021-3038 was published on 2021-04-20 and last updated on 2026-06-17.

CVE-2021-3038

CVE-2021-3038 is a medium-severity vulnerability in Paloaltonetworks Globalprotect with a CVSS 3.x base score of 5.5. 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: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Paloaltonetworks Globalprotect
Published: 2021-04-20
Last modified: 2026-06-17

Description

A denial-of-service (DoS) vulnerability in Palo Alto Networks GlobalProtect app on Windows systems allows a limited Windows user to send specifically-crafted input to the GlobalProtect app that results in a Windows blue screen of death (BSOD) error. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.8; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.4.

Frequently asked questions

What is CVE-2021-3038?: A denial-of-service (DoS) vulnerability in Palo Alto Networks GlobalProtect app on Windows systems allows a limited Windows user to send specifically-crafted input to the GlobalProtect app that results in a Windows blue screen of death (BSOD) error. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.8; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.4.
How severe is CVE-2021-3038?: CVE-2021-3038 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-3038 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3038?: CVE-2021-3038 affects Paloaltonetworks Globalprotect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3038?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3038 published?: CVE-2021-3038 was published on 2021-04-20 and last updated on 2026-06-17.

References

https://security.paloaltonetworks.com/CVE-2021-3038

Affected products (1)

cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:windows:*:*

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