CVE-2021-3057
CVE-2021-3057 is a high-severity vulnerability in Paloaltonetworks Globalprotect with a CVSS 3.x base score of 8.1. 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-787.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- CVSS v2: 9.3
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Paloaltonetworks Globalprotect
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-3057?
- 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.
- How severe is CVE-2021-3057?
- CVE-2021-3057 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-3057 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-3057?
- CVE-2021-3057 primarily affects Paloaltonetworks Globalprotect. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-3057?
- 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-2021-3057 published?
- CVE-2021-3057 was published on 2021-10-13 and last updated on 2026-06-17.
References
Affected products (5)
- cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:linux:*:*
- cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:macos:*:*
- cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:windows:*:*
- cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:universal_windows_platform:*:*
- cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:universal_windows_platform:*:*
More vulnerabilities in Paloaltonetworks Globalprotect
- CVE-2025-4232 — High (CVSS 8.8): An improper neutralization of wildcards vulnerability in the log collection feature of Palo Alto Networks…
- CVE-2024-5921 — High (CVSS 8.8): An insufficient certification validation issue in the Palo Alto Networks GlobalProtect app enables attackers to connect…
- CVE-2025-0118 — High (CVSS 8.0): A vulnerability in the Palo Alto Networks GlobalProtect app on Windows allows a remote attacker to run ActiveX controls…
- CVE-2024-9473 — High (CVSS 7.8): A privilege escalation vulnerability in the Palo Alto Networks GlobalProtect app on Windows allows a locally…
- CVE-2024-5915 — High (CVSS 7.8): A privilege escalation (PE) vulnerability in the Palo Alto Networks GlobalProtect app on Windows devices enables a…
- CVE-2023-0009 — High (CVSS 7.8): A local privilege escalation (PE) vulnerability in the Palo Alto Networks GlobalProtect app on Windows enables a local…
All CVEs affecting Paloaltonetworks Globalprotect →
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