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    CVE-2021-3063

    An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.21; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h4; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h3; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8-h4; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers are not impacted by this issue.

    Published:Nov 10, 2021
    Last Modified:Nov 21, 2024
    EPS:Nov 10, 2021
    EPSS Score:0.00648
    CVSS Score:7.5

    Affected Products

    Vendor
    Paloaltonetworks
    Product
    Pan-os

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-0280 (CVSS 1.7) — An IPv6 packet processing vulnerability in the dataplane of Palo Alto Networks PAN-OS® software enables an una…
    CVE-2026-0281 (CVSS 2.1) — An information disclosure vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated atta…
    CVE-2026-0282 (CVSS 2.7) — A file deletion vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with …
    CVE-2026-0283 (CVSS 4.5) — An authentication bypass vulnerability in Large Scale VPN ( LSVPN) functionality of Palo Alto Networks PAN-OS …
    CVE-2026-0284 (CVSS 4.7) — An XML injection vulnerability in the Large Scale VPN (LSVPN) functionality of Palo Alto Networks PAN-OS® soft…
    CVE-2026-0285 (CVSS 4.7) — A server-side request forgery (SSRF) vulnerability in Palo Alto Networks PAN-OS software enables an authentica…
    CVE-2026-0286 (CVSS 6) — A command injection vulnerability in the management plane of Palo Alto Networks PAN-OS® software enables an au…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High