CVE-2021-1442

Cisco IOS XE Software Plug-and-Play Privilege Escalation Vulnerability

A vulnerability in a diagnostic command for the Plug-and-Play (PnP) subsystem of Cisco IOS XE Software could allow an authenticated, local attacker to elevate privileges to the level of an Administrator user (level 15) on an affected device. The vulnerability is due to insufficient protection of sensitive information. An attacker with low privileges could exploit this vulnerability by issuing the diagnostic CLI show pnp profile when a specific PnP listener is enabled on the device. A successful exploit could allow the attacker to obtain a privileged authentication token. This token can be used to send crafted PnP messages and execute privileged commands on the targeted system.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2021-1441

Cisco IOS XE Software Hardware Initialization Routines Arbitrary Code Execution Vulnerability

A vulnerability in the hardware initialization routines of Cisco IOS XE Software for Cisco 1100 Series Industrial Integrated Services Routers and Cisco ESR6300 Embedded Series Routers could allow an authenticated, local attacker to execute unsigned code at system boot time. This vulnerability is due to incorrect validations of parameters passed to a diagnostic script that is executed when the device boots up. An attacker could exploit this vulnerability by tampering with an executable file stored on a device. A successful exploit could allow the attacker to execute unsigned code at boot time and bypass the software image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need administrative level credentials (level 15) on the device.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Esr6300 Ios Xe Ir1101

CVE-2021-1439

Cisco Aironet Access Points FlexConnect Multicast DNS Denial of Service Vulnerability

A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device through a wireless network that is configured in FlexConnect local switching mode or through a wired network on a configured mDNS VLAN. A successful exploit could allow the attacker to cause the access point (AP) to reboot, resulting in a DoS condition.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router Aironet 1540 Aironet 1560 and 10 more

CVE-2021-1438

Cisco Wide Area Application Services Software Information Disclosure Vulnerability

A vulnerability in Cisco Wide Area Application Services (WAAS) Software could allow an authenticated, local attacker to gain access to sensitive information on an affected device. The vulnerability is due to improper input validation and authorization of specific commands that a user can execute within the CLI. An attacker could exploit this vulnerability by authenticating to an affected device and issuing a specific set of commands. A successful exploit could allow the attacker to read arbitrary files that they originally did not have permissions to access.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Wide Area Application Services

CVE-2021-1437

Cisco Aironet Access Points FlexConnect Upgrade Information Disclosure Vulnerability

A vulnerability in the FlexConnect Upgrade feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, remote attacker to obtain confidential information from an affected device. This vulnerability is due to an unrestricted Trivial File Transfer Protocol (TFTP) configuration. An attacker could exploit this vulnerability by sending a specific TFTP request to an affected device. A successful exploit could allow the attacker to download any file from the filesystem of the affected access point (AP).

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router Aironet 1540 Aironet 1560 and 11 more

CVE-2021-1436

Cisco IOS XE SD-WAN Software Path Traversal Vulnerability

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to conduct path traversal attacks and obtain read access to sensitive files on an affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to view arbitrary files on the affected system.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2021-1434

Cisco IOS XE SD-WAN Software Arbitrary File Corruption Vulnerability

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to overwrite arbitrary files in the underlying file system. This vulnerability is due to insufficient validation of the parameters of a specific CLI command. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content of any arbitrary file that resides on the underlying host file system.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2021-1433

Cisco IOS XE SD-WAN Software vDaemon Buffer Overflow Vulnerability

A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when the device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. The attacker must have a man-in-the-middle position between Cisco vManage and an associated device that is running an affected version of Cisco IOS XE SD-WAN Software. An exploit could allow the attacker to conduct a controllable buffer overflow attack (and possibly execute arbitrary commands as the root user) or cause a device reload, resulting in a denial of service (DoS) condition.

CVSS 3.1 · 8.1 High EPSS 2.3% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2021-1431

Cisco IOS XE SD-WAN Software vDaemon Denial of Service Vulnerability

A vulnerability in the vDaemon process of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

CVSS 3.1 · 7.5 High EPSS 1.7% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2021-1430

Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabilities

Multiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to hijack DLL or executable files that are used by the application. A successful exploit could allow the attacker to execute arbitrary code on an affected device with SYSTEM privileges. To exploit these vulnerabilities, the attacker must have valid credentials on the Windows system. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2021-1429

Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabilities

Multiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to hijack DLL or executable files that are used by the application. A successful exploit could allow the attacker to execute arbitrary code on an affected device with SYSTEM privileges. To exploit these vulnerabilities, the attacker must have valid credentials on the Windows system. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2021-1428

Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabilities

Multiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to hijack DLL or executable files that are used by the application. A successful exploit could allow the attacker to execute arbitrary code on an affected device with SYSTEM privileges. To exploit these vulnerabilities, the attacker must have valid credentials on the Windows system. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2021-1427

Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabilities

Multiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to hijack DLL or executable files that are used by the application. A successful exploit could allow the attacker to execute arbitrary code on an affected device with SYSTEM privileges. To exploit these vulnerabilities, the attacker must have valid credentials on the Windows system. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2021-1426

Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabilities

Multiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to hijack DLL or executable files that are used by the application. A successful exploit could allow the attacker to execute arbitrary code on an affected device with SYSTEM privileges. To exploit these vulnerabilities, the attacker must have valid credentials on the Windows system. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2021-1423

Cisco Aironet Access Points Arbitrary File Overwrite Vulnerability

A vulnerability in the implementation of a CLI command in Cisco Aironet Access Points (AP) could allow an authenticated, local attacker to overwrite files in the flash memory of the device. This vulnerability is due to insufficient input validation for a specific command. An attacker could exploit this vulnerability by issuing a command with crafted arguments. A successful exploit could allow the attacker to overwrite or create files with data that is already present in other files that are hosted on the affected device.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router Aironet 1540 Aironet 1560 and 11 more

CVE-2021-1421

Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability

A vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, local attacker to perform a command injection attack on an affected device. The vulnerability is due to insufficient validation of user-supplied input to a configuration command. An attacker could exploit this vulnerability by including malicious input during the execution of this command. A successful exploit could allow a non-privileged attacker authenticated in the restricted CLI to execute arbitrary commands on the underlying operating system (OS) with root privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Enterprise Nfv Infrastructure Software

CVE-2021-1420

Cisco Webex Meetings HTML Injection Vulnerability

A vulnerability in certain web pages of Cisco Webex Meetings could allow an unauthenticated, remote attacker to modify a web page in the context of a user's browser. The vulnerability is due to improper checks on parameter values in affected pages. An attacker could exploit this vulnerability by persuading a user to follow a crafted link that is designed to pass HTML code into an affected parameter. A successful exploit could allow the attacker to alter the contents of a web page to redirect the user to potentially malicious websites, or the attacker could use this vulnerability to conduct further client-side attacks.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Webex Meetings

CVE-2021-1419

Cisco Access Points SSH Management Privilege Escalation Vulnerability

A vulnerability in the SSH management feature of multiple Cisco Access Points (APs) platforms could allow a local, authenticated user to modify files on the affected device and possibly gain escalated privileges. The vulnerability is due to improper checking on file operations within the SSH management interface. A network administrator user could exploit this vulnerability by accessing an affected device through SSH management to make a configuration change. A successful exploit could allow the attacker to gain privileges equivalent to the root user.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100-8p 1100-8p Firmware 1120 and 81 more

CVE-2021-1418

Cisco Jabber Desktop and Mobile Client Software Vulnerabilities

Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms could allow an attacker to execute arbitrary programs on the underlying operating system with elevated privileges, access sensitive information, intercept protected network traffic, or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Jabber

CVE-2021-1417

Cisco Jabber Desktop and Mobile Client Software Vulnerabilities

Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms could allow an attacker to execute arbitrary programs on the underlying operating system with elevated privileges, access sensitive information, intercept protected network traffic, or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Jabber