Cisco Security Advisories & CVEs
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Latest Cisco advisories
Medium [CVE-2026-20031] ClamAV Cascading Style Sheets Image Parsing Error Handling Denial of Service Vulnerability
A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulne… Affected product named by the advisory: Cisco Secure Endpoint Private Cloud Console.
Medium [CVE-2026-20018] Cisco Secure Firewall Management Center and Secure Firewall Threat Defense Software Path Traversal Vulnerability
A vulnerability in the sftunnel functionality of Cisco Secure Firewall Management Center (FMC) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrative privileges to write arbitrary files as root on the underlying operating system. This vulnerability is due to insufficient validation of the directory path during file synchronization. An attacker could exploit this vulnerability by crafting a directory path outside of the expected file location. A successful exploit could allow the attacker to create or replace any fil… Affected products named by the advisory: Cisco Secure Firewall Management Center (FMC) 7.0.0.1; Cisco Secure Firewall Management Center (FMC) 7.0.1.1; Cisco Secure Firewall Management Center (FMC) 7.0.2.1; Cisco Secure Firewall Management Center (FMC) 7.0.3; and 2 more.
Medium [CVE-2026-20053 +3] Multiple Cisco Products Snort 3 Visual Basic for Applications Denial of Service Vulnerabilities
Multiple Cisco products are affected by vulnerabilities in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to unexpectedly restart, resulting in a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has released software updates that address these vulnerabilities. There are workarounds that address these vulnerabilities. This advisory is part of the March 2026 release of the Cisco Secure Firewall ASA,… Affected products named by the advisory: Cisco Cyber Vision; Cisco UTD SNORT IPS Engine Software; Cisco Secure Firewall Threat Defense (FTD) Software 7.2.0.1; Cisco Secure Firewall Threat Defense (FTD) Software 7.2.1; and 4 more.
High [CVE-2026-20033] Cisco Nexus 9000 Series Fabric Switches in ACI Mode Denial of Service Vulnerability
A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. Note: Only the out-of-band (OOB) management interface is affe… Affected products named by the advisory: Cisco NX-OS System Software in ACI Mode 15.2(1g); Cisco NX-OS System Software in ACI Mode 15.2(2e); Cisco NX-OS System Software in ACI Mode 15.2(2f); Cisco NX-OS System Software in ACI Mode 15.2(2g); and 4 more.
High [CVE-2026-20048] Cisco Nexus 9000 Series Fabric Switches in ACI Mode SNMP Denial of Service Vulnerability
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper processing when parsing SNMP requests. An attacker could exploit this vulnerability by continuously sending SNMP queries to a specific MIB of an affected device. A successful exploit could allow the attacker to cause a kernel panic on the device, resulting in a reload and a DoS condition. Note: This vulnerability … Affected products named by the advisory: Cisco NX-OS System Software in ACI Mode 15.2(1g); Cisco NX-OS System Software in ACI Mode 15.2(2e); Cisco NX-OS System Software in ACI Mode 15.2(2f); Cisco NX-OS System Software in ACI Mode 15.2(2g); and 4 more.
High [CVE-2026-20051] Cisco Nexus 3600 and 9500-R Series Switching Platforms Layer 2 Loop Denial of Service Vulnerability
A vulnerability with the Ethernet VPN (EVPN) Layer 2 ingress packet processing of Cisco Nexus 3600 Platform Switches and Cisco Nexus 9500-R Series Switching Platforms could allow an unauthenticated, adjacent attacker to trigger a Layer 2 traffic loop. This vulnerability is due to a logic error when processing a crafted Layer 2 ingress frame. An attacker could exploit this vulnerability by sending a stream of crafted Ethernet frames through the targeted device. A successful exploit could allow the attacker to cause a Layer 2 Virtual eXtensible LAN (VxLAN) traffic loop, which, in turn, could … Affected products named by the advisory: Cisco NX-OS Software 9.2(1); Cisco NX-OS Software 9.2(2); Cisco NX-OS Software 9.2(2t); Cisco NX-OS Software 9.2(3); and 4 more.
High [CVE-2026-20010] Cisco NX-OS Software Link Layer Discovery Protocol Denial of Service Vulnerability
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly. This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. Affected products named by the advisory: Cisco Unified Computing System (Managed); Cisco NX-OS Software 10.3(1); Cisco NX-OS Software 10.3(2); Cisco NX-OS Software 10.3(3); and 5 more.
Medium [CVE-2026-20107] Cisco Application Policy Infrastructure Controller Denial of Service Vulnerability
A vulnerability in the Object Model CLI component of Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. To exploit this vulnerability, the attacker must have valid user credentials and any role that includes CLI access. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by issuing crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the device to re…
Medium [CVE-2026-20037] Cisco UCS Manager Software Privilege Escalation Vulnerability
A vulnerability in the NX-OS CLI privilege levels of Cisco UCS Manager Software could allow an authenticated, local attacker with read-only privileges to modify files and perform unauthorized actions on an affected system. This vulnerability exists because unnecessary privileges are given to the user. An attacker could exploit this vulnerability by authenticating to a device as a read-only user and connecting to the NX-OS CLI. A successful exploit could allow the attacker to create or overwrite files in the file system or perform limited privileged actions on an affected device. Cisco has r… Affected products named by the advisory: Cisco Unified Computing System (Managed).
Medium [CVE-2026-20036] Cisco UCS Manager Software Command Injection Vulnerability
A vulnerability in the CLI and web-based management interface of Cisco UCS Manager Software could allow an authenticated, remote attacker with valid administrative privileges to execute arbitrary commands on the underlying operating system of an affected device. This vulnerability is due to insufficient input validation of command arguments that are supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. Affected products named by the advisory: Cisco Unified Computing System (Managed); NX-OS.
Medium [CVE-2026-20091] Cisco FXOS and UCS Manager Software Stored Cross-Site Scripting Vulnerability
A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious data into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affecte… Affected products named by the advisory: Cisco Unified Computing System (Managed); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5; and 4 more.
Medium [CVE-2026-20099] Cisco FXOS and UCS Manager Software Command Injection Vulnerability
A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root. This vulnerability is due to insufficient input validation of command arguments supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlyi… Affected products named by the advisory: Cisco Unified Computing System (Managed); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5; and 4 more.
High [CVE-2026-20098] Cisco Meeting Management Arbitrary File Upload Vulnerability
A vulnerability in the Certificate Management feature of Cisco Meeting Management could allow an authenticated, remote attacker to upload arbitrary files, execute arbitrary commands, and elevate privileges to root on an affected system. This vulnerability is due to improper input validation in certain sections of the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. The malicious files could overwrite system files…
High [CVE-2026-20119] Cisco TelePresence Collaboration Endpoint Software and RoomOS Software Denial of Service Vulnerability
A vulnerability in the text rendering subsystem of Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of input received by an affected device. An attacker could exploit this vulnerability by getting the affected device to render crafted text, for example, a crafted meeting invitation. As indicated in the CVSS score, no user interaction is required, such as accepting the meeting invitation. A su… Affected products named by the advisory: Cisco TelePresence Endpoint Software (TC/CE).
Medium [CVE-2026-20056] Cisco Secure Web Appliance Real-Time Scanning Archive File Bypass Vulnerability
A vulnerability in the Dynamic Vectoring and Streaming (DVS) Engine implementation of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass the anti-malware scanner, allowing malicious archive files to be downloaded. This vulnerability is due to improper handling of certain archive files. An attacker could exploit this vulnerability by sending a crafted archive file, which should be blocked, through an affected device. A successful exploit could allow the attacker to bypass the anti-malware scanner and download malware onto an end us…
Medium [CVE-2026-20123] Cisco Evolved Programmable Network Manager and Cisco Prime Infrastructure Open Redirect Vulnerability
A vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) and Cisco Prime Infrastructure could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input validation of the parameters in the HTTP request. An attacker could exploit this vulnerability by intercepting and modifying an HTTP request from a user. Cisco has released software updates that address this vulnerability. There ar…
Medium [CVE-2026-20111] Cisco Prime Infrastructure Stored Cross-Site Scripting Vulnerability
A vulnerability in the web-based management interface of Cisco Prime Infrastructure could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against users of the interface of an affected system. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by inserting malicious code into specific data fields in the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or ac…
High [CVE-2026-20045] Cisco Unified Communications Products Remote Code Execution Vulnerability
A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of craf… Affected products named by the advisory: Cisco Unified Communications Manager IM and Presence Service.
Medium [CVE-2026-20080] Cisco IEC6400 Wireless Backhaul Edge Compute Software SSH Denial of Service Vulnerability
A vulnerability in the SSH service of Cisco IEC6400 Wireless Backhaul Edge Compute Software could allow an unauthenticated, remote attacker to cause the SSH service to stop responding. This vulnerability exists because the SSH service lacks effective flood protection. An attacker could exploit this vulnerability by initiating a denial of service (DoS) attack against the SSH port. A successful exploit could allow the attacker to cause the SSH service to be unresponsive during the period of the DoS attack. All other operations remain stable during the attack. Cisco has released software updat… Affected product named by the advisory: Cisco Ultra-Reliable Wireless Backhaul.
Medium [CVE-2026-20092] Cisco Intersight Virtual Appliance Privilege Escalation Vulnerability
A vulnerability in the read-only maintenance shell of Cisco Intersight Virtual Appliance could allow an authenticated, local attacker with administrative privileges to elevate privileges to root on the virtual appliance. This vulnerability is due to improper file permissions on configuration files for system accounts within the maintenance shell of the virtual appliance. An attacker could exploit this vulnerability by accessing the maintenance shell as a read-only administrator and manipulating system files to grant root privileges. A successful exploit could allow the attacker to elevate t…