CVE-2021-1577— Cisco Application Policy Infrastructure Controller Arbitrary File Read and Write Vulnerability
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I. Basic Information for CVE-2021-1577
Vulnerability Information
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Vulnerability Title
Cisco Application Policy Infrastructure Controller Arbitrary File Read and Write Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in an API endpoint of Cisco Application Policy Infrastructure Controller (APIC) and Cisco Cloud Application Policy Infrastructure Controller (Cloud APIC) could allow an unauthenticated, remote attacker to read or write arbitrary files on an affected system. This vulnerability is due to improper access control. An attacker could exploit this vulnerability by using a specific API endpoint to upload a file to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on an affected device.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Application Policy Infrastructure Controller 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Application Policy Infrastructure Controller（APIC）是美国思科（Cisco）公司的一款自动化的基础架构部署和治理解决方案。 Cisco Application Policy Infrastructure Controller 存在安全漏洞，该漏洞源于访问控制不当造成的。攻击者可以通过使用特定 API 端点将文件上传到受影响的设备来利用此漏洞。成功的利用可能允许攻击者在受影响的设备上读取或写入任意文件。
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 |
|---|---|---|---|---|
| Cisco | Cisco Application Policy Infrastructure Controller (APIC) | n/a | - |
II. Public POCs for CVE-2021-1577
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capic-frw-Nt3RYxR2vendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-1577
Same Patch Batch · Cisco · 2021-08-25 · 15 CVEs total
| CVE-2021-1578 | 8.8 HIGH | Cisco Application Policy Infrastructure Controller Privilege Escalation Vulnerability |
| CVE-2021-1588 | 8.6 HIGH | Cisco NX-OS Software MPLS OAM Denial of Service Vulnerability |
| CVE-2021-1587 | 8.6 HIGH | Cisco NX-OS Software VXLAN OAM (NGOAM) Denial of Service Vulnerability |
| CVE-2021-1586 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches ACI Mode Multi-Pod and Multi-Site TCP Denial of Se |
| CVE-2021-1523 | 8.6 HIGH | Cisco Nexus 9000 Series Fabric Switches ACI Mode Queue Wedge Denial of Service Vulnerabili |
| CVE-2021-1579 | 8.1 HIGH | Cisco Application Policy Infrastructure Controller App Privilege Escalation Vulnerability |
| CVE-2021-1581 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller Command Injection and File Upload Vulne |
| CVE-2021-1580 | 6.5 MEDIUM | Cisco Application Policy Infrastructure Controller Command Injection and File Upload Vulne |
| CVE-2021-1584 | 6.0 MEDIUM | Cisco Nexus 9000 Series Fabric Switches ACI Mode Privilege Escalation Vulnerability |
| CVE-2021-1591 | 5.8 MEDIUM | Cisco Nexus 9500 Series Switches Access Control List Bypass Vulnerability |
| CVE-2021-1582 | 5.4 MEDIUM | Cisco Application Policy Infrastructure Controller Stored Cross-Site Scripting Vulnerabili |
| CVE-2021-1590 | 5.3 MEDIUM | Cisco NX-OS Software system login block-for Denial of Service Vulnerability |
| CVE-2021-1583 | 4.4 MEDIUM | Cisco Nexus 9000 Series Fabric Switches ACI Mode Arbitrary File Read Vulnerability |
| CVE-2021-1592 | 4.3 MEDIUM | Cisco UCS Manager Software SSH Sessions Denial of Service Vulnerability |
IV. Related Vulnerabilities
- CVE-2026-20107
Cisco Application Policy Infrastructure Controller Denial of - CVE-2025-20119
Cisco Application Policy Infrastructure Controller Authentic - CVE-2025-20118
Cisco Application Policy Infrastructure Controller Authentic - CVE-2025-20117
Cisco Application Policy Infrastructure Controller Authentic - CVE-2025-20116
Cisco Application Policy Infrastructure Controller Stored Cr
Same vendor: Cisco
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Cisco Slido 安全漏洞 - CVE-2026-20034
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Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-284
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Avo: Broken Access Control: Unauthorized Execution of Arbitr - CVE-2026-41487
Langfuse: Improper role-based-access control in Langfuse LLM - CVE-2026-42278
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V. Comments for CVE-2021-1577
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