CVE-2021-3057

GlobalProtect App: Buffer Overflow Vulnerability When Connecting to Portal or Gateway

HIGH

8.1

CVSS Score

Published: October 13, 2021 at 04:10 PM UTC

Updated: June 17, 2026 at 04:04 AM UTC

1 product affected across 1 vendorGlobalProtect

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Severity

HIGH8.1

Exploit prediction

EPSS 1%

Description

A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a man-in-the-middle attacker to disrupt system processes and potentially execute arbitrary code with SYSTEM privileges. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.9 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on the Universal Windows Platform; GlobalProtect app 5.3 versions earlier than GlobalProtect app 5.3.1 on Linux.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GlobalProtect · Palo Alto Networks

95%

5.0 ≤ v ≤ 5.0.105.0 ≤ v ≤ 5.0.85.0 ≤ v ≤ 5.0.95.1 ≤ v ≤ 5.1.15.1 ≤ v < 5.1.95.1.0 ≤ v ≤ 5.1.45.2 ≤ v < 5.2.85.3 ≤ v < 5.3.15.0 5.1 5.2 5.3

Affected range stops below 5.1.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.2.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.3.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://security.paloaltonetworks.com/CVE-2021-3057

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://security.paloaltonetworks.com/CVE-2021-3057

CVSS

8.1HIGHpalo_alto

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-121CWE-787

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