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CVE-2021-1520— Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Local Privilege Escalation Vulnerability

Quick assessment

Affected
Cisco Cisco Small Business RV Series Router Firmware
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 路由器是美国思科（Cisco）公司的一个路由器。 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers 存在安全漏洞，该漏洞允许经过身份验证的本地攻击者可利用该漏洞运行任意命令。

CVSS 6.7 · Medium EPSS 0.29% · P20
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I. Basic Information for CVE-2021-1520

Vulnerability Information
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Vulnerability Title
Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Local Privilege Escalation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the internal message processing of Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, local attacker to run arbitrary commands with root privileges on the underlying operating system (OS). This vulnerability exists because an internal messaging service does not properly sanitize input. An attacker could exploit this vulnerability by first authenticating to the device and then sending a crafted request to the internal service. A successful exploit could allow the attacker to run arbitrary commands with root privileges on the underlying OS. To exploit this vulnerability, the attacker must have valid Administrator credentials for the device.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
任意地址可写任意内容条件
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco 路由器 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco 路由器是美国思科（Cisco）公司的一个路由器。 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers 存在安全漏洞，该漏洞允许经过身份验证的本地攻击者可利用该漏洞运行任意命令。
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 Small Business RV Series Router Firmware n/a -

II. Public POCs for CVE-2021-1520

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III. Intelligence Information for CVE-2021-1520

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Vendor Advisories for CVE-2021-1520 (1)

Same Patch Batch · Cisco · 2021-05-06 · 41 CVEs total

CVE-2021-1508 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1506 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1505 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1275 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1468 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1498 9.8 CRITICAL Cisco HyperFlex HX Command Injection Vulnerabilities
CVE-2021-1497 9.8 CRITICAL Cisco HyperFlex HX Command Injection Vulnerabilities
CVE-2021-1284 8.8 HIGH Cisco SD-WAN vManage Software Authentication Bypass Vulnerability
CVE-2021-1401 8.8 HIGH Cisco Small Business 100, 300, and 500 Series Wireless Access Points Vulnerabilities
CVE-2021-1400 8.8 HIGH Cisco Small Business 100, 300, and 500 Series Wireless Access Points Vulnerabilities
CVE-2021-1421 7.8 HIGH Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability
CVE-2021-1513 7.5 HIGH Cisco SD-WAN Software vDaemon Denial of Service Vulnerability
CVE-2021-1509 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1510 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1511 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1365 7.1 HIGH Cisco Unified Communications Manager IM & Presence Service SQL Injection Vulnerabilities
CVE-2021-1363 7.1 HIGH Cisco Unified Communications Manager IM & Presence Service SQL Injection Vulnerabilities
CVE-2021-1426 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi
CVE-2021-1427 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi
CVE-2021-1430 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi

Showing top 20 of 41 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Small Business RV Series Router Firmware
Same vendor: Cisco
Same weakness: CWE-123

V. Comments for CVE-2021-1520

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