CVE-2020-3545— Cisco FXOS Software Buffer Overflow Vulnerability
Quick assessment
Affected
Cisco Cisco Firepower Extensible Operating System (FXOS)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cisco FXOS Software是美国思科（Cisco）公司的一套运行在思科安全设备中的防火墙软件。 Cisco FXOS存在缓冲区错误漏洞，本地攻击者可借助特制的文件利用该漏洞造成缓冲区溢出并执行任意代码。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2020-3545
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Cisco FXOS Software Buffer Overflow Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco FXOS Software could allow an authenticated, local attacker with administrative credentials to cause a buffer overflow condition. The vulnerability is due to incorrect bounds checking of values that are parsed from a specific file. An attacker could exploit this vulnerability by supplying a crafted file that, when it is processed, may cause a stack-based buffer overflow. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system with root privileges. An attacker would need to have valid administrative credentials to exploit this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco FXOS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco FXOS Software是美国思科（Cisco）公司的一套运行在思科安全设备中的防火墙软件。 Cisco FXOS存在缓冲区错误漏洞，本地攻击者可借助特制的文件利用该漏洞造成缓冲区溢出并执行任意代码。
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 Firepower Extensible Operating System (FXOS) | n/a | - |
|
II. Public POCs for CVE-2020-3545
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2020-3545
请登录查看更多情报信息。
Vendor Advisories for CVE-2020-3545 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-buffer-cSdmfWUt vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2020-09-04 · 15 CVEs total
| CVE-2020-3495 | 9.9 CRITICAL | Cisco Jabber for Windows Message Handling Arbitrary Code Execution Vulnerability |
| CVE-2020-3430 | 8.8 HIGH | Cisco Jabber for Windows Protocol Handler Command Injection Vulnerability |
| CVE-2020-3530 | 8.4 HIGH | Cisco IOS XR Authenticated User Privilege Escalation Vulnerability |
| CVE-2020-3478 | 8.1 HIGH | Cisco Enterprise NFV Infrastructure Software File Overwrite Vulnerability |
| CVE-2020-3498 | 6.5 MEDIUM | Cisco Jabber for Windows Information Disclosure Vulnerability |
| CVE-2020-3537 | 5.7 MEDIUM | Cisco Jabber for Windows Universal Naming Convention Link Handling Vulnerability |
| CVE-2020-3542 | 5.3 MEDIUM | Cisco Webex Training Unauthorized Meeting Join Vulnerability |
| CVE-2020-3451 | 4.7 MEDIUM | Cisco Small Business RV340 Series Routers Command Injection and Remote Code Execution Vuln |
| CVE-2020-3453 | 4.7 MEDIUM | Cisco Small Business RV340 Series Routers Command Injection and Remote Code Execution Vuln |
| CVE-2020-3541 | 4.4 MEDIUM | Cisco Webex Meetings Client for Windows, Webex Meetings Desktop App, and Webex Teams Infor |
| CVE-2020-3547 | 4.3 MEDIUM | Cisco Email Security Appliance, Cisco Content Security Management Appliance, and Cisco Web |
| CVE-2020-3365 | 4.3 MEDIUM | Cisco Enterprise NFV Infrastructure Software Path Traversal Vulnerability |
| CVE-2020-3473 | Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability | |
| CVE-2020-3546 | Cisco Email Security Appliance Information Disclosure Vulnerability |
IV. Related Vulnerabilities
Same product: Cisco Firepower Extensible Operating System (FXOS)
-
CVE-2026-20099
Cisco UCS Manager and FXOS Software Command Injection Vulner -
CVE-2026-20091
Cisco UCS Manager and FXOS Software Stored Cross-Site Script -
CVE-2022-20865
Cisco FXOS Software Command Injection Vulnerability -
CVE-2020-3455
Cisco FXOS Software for Firepower 4100/9300 Series Appliance -
CVE-2020-3459
Cisco FXOS Software for Firepower 4100/9300 Series Command I
Same vendor: Cisco
-
CVE-2026-20293
Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot By -
CVE-2026-20355
Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty -
CVE-2026-20354
Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty -
CVE-2026-20281
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, -
CVE-2026-20280
Cisco IOS XR Software Security Hardening Release: September
Same weakness: CWE-119
V. Comments for CVE-2020-3545
No comments yet