CVE-2021-3053— PAN-OS: Exceptional Condition Denial-of-Service (DoS)
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I. Basic Information for CVE-2021-3053
Vulnerability Information
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Vulnerability Title
PAN-OS: Exceptional Condition Denial-of-Service (DoS)
Source: NVD (National Vulnerability Database)
Vulnerability Description
An improper handling of exceptional conditions vulnerability exists in the Palo Alto Networks PAN-OS dataplane that enables an unauthenticated network-based attacker to send specifically crafted traffic through the firewall that causes the service to crash. 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 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.5. This issue does not affect Prisma Access.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对异常条件的处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Palo Alto Networks PAN-OS 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS dataplan 存在权限许可和访问控制问题漏洞，该漏洞源于 Palo Alto Networks PAN-OS dataplan 中存在对异常条件漏洞的不当处理，该漏洞使未经身份验证的基于网络的攻击者能够通过防火墙发送特制的流量，从而导致服务崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Palo Alto Networks | PAN-OS | 10.1.* | - |
II. Public POCs for CVE-2021-3053
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://security.paloaltonetworks.com/CVE-2021-3053x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3053
Same Patch Batch · Palo Alto Networks · 2021-09-08 · 6 CVEs total
| CVE-2021-3051 | 8.1 HIGH | Cortex XSOAR: Authentication Bypass in SAML Authentication |
| CVE-2021-3052 | 8.0 HIGH | PAN-OS: Reflected Cross-Site Scripting (XSS) in Web Interface |
| CVE-2021-3054 | 7.2 HIGH | PAN-OS: Unsigned Code Execution During Plugin Installation Race Condition Vulnerability |
| CVE-2021-3055 | 6.5 MEDIUM | PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface |
| CVE-2021-3049 | 2.6 LOW | Cortex XSOAR: Improper Authorization of Incident Investigations Vulnerability |
IV. Related Vulnerabilities
Same product: PAN-OS
- CVE-2025-0116
PAN-OS: Firewall Denial of Service (DoS) Using a Specially C - CVE-2025-0115
PAN-OS: Authenticated Admin File Read Vulnerability in PAN-O - CVE-2025-0114
PAN-OS: Denial of Service (DoS) in GlobalProtect - CVE-2024-9471
PAN-OS: Privilege Escalation (PE) Vulnerability in XML API - CVE-2024-8691
PAN-OS: User Impersonation in GlobalProtect Portal
Same vendor: Palo Alto Networks
- CVE-2026-0300
PAN-OS: Unauthenticated user initiated Buffer Overflow Vulne - CVE-2026-0232
Cortex XDR Agent: Local Administrator can disable the agent - CVE-2026-0233
Autonomous Digital Experience Manager: Improper validation o - CVE-2026-0234
Cortex XSOAR: Improper Verification of Cryptographic Signatu - CVE-2026-0231
Cortex XDR Broker VM: Sensitive Information Disclosure Vulne
Same weakness: CWE-755
- CVE-2026-23666
.NET Framework Denial of Service Vulnerability - CVE-2026-40074
SvelteKit's invalidated redirect in handle hook causes Denia - CVE-2026-28542
Huawei EMUI和Huawei HarmonyOS 安全漏洞 - CVE-2026-27195
Wasmtime is vulnerable to panic when dropping a `[Typed]Func - CVE-2026-27586
Caddy's mTLS client authentication silently fails open when
V. Comments for CVE-2021-3053
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