CVE-2023-20086

CVE-2023-20086 affects Cisco ASA and Cisco FTD software, where improper ICMPv6 message processing could let an unauthenticated, remote attacker trigger a DoS by forcing a device reload. This is a network-facing issue (CVSS v3.1: 8.6, HIGH, NO privileges required; CPU/network target), with exploit...

CVE-2025-20182

The CVE-2025-20182 entry describes a DoS vulnerability in IKEv2 message processing affecting Cisco ASA, FTD, IOS, and IOS XE. The root cause is insufficient input validation when handling IKEv2 traffic, which could allow an unauthenticated remote attacker to force a device reload and thus a DoS c...

CVE-2016-1287

CVE-2016-1287 is a Cisco ASA/IOS IKEv1/v2 buffer overflow affecting ASA on multiple platforms. The issue allows remote attackers to execute arbitrary code or cause a device reload via crafted UDP packets. Affected software versions include ASA 8.4(x) up to 8.4(7.30), 8.7 up to 8.7(1.18), and 9.x ...

CVE-2018-0230

Cisco Firepower 2100 Series appliances running FTD 6.2.1–6.2.2 are vulnerable due to improper validation of fragmented IPv4/IPv6 packets after reassembly in the internal packet-processing path, causing Snort processes to reach 100% CPU and a DoS. Exploitation requires sending malicious fragmented...

CVE-2020-3254

The CVE-2020-3254 issue affects Cisco ASA and Firepower Threat Defense (FTD) software, specifically the Media Gateway Control Protocol (MGCP) inspection feature. The vulnerability arises from inefficient memory management in MGCP inspection, allowing an unauthenticated, remote attacker to send cr...

CVE-2014-2127

CVE-2014-2127 affects Cisco ASA SSL VPN privilege escalation via improper handling of management-session information during privilege validation in SSL VPN portal connections. A remote authenticated user can gain privileges by establishing a Clientless SSL VPN session and supplying crafted URLs. ...

CVE-2018-0228

The CVE-2018-0228 issue is a vulnerability in the ingress flow creation in Cisco ASA/FTD software. The root cause is improper handling of an internal software lock that can starve other processes of CPU cycles, causing a high CPU condition and DoS when an attacker sends a steady stream of malicio...

CVE-2021-1504

CVE-2021-1504 affects Cisco ASA and Firepower Threat Defense (FTD) Software. The issue arises from improper input validation of HTTPS requests, allowing an unauthenticated, remote attacker to trigger a device reload and cause a DoS. Exploitation involves sending a crafted HTTPS request to a vulne...

CVE-2018-0231

The CVE-2018-0231 issue is a TLS library input-validation vulnerability in Cisco ASA/FTD software (including ASA, ASAv, FTDv, and Firepower 2100 Series) that allows an unauthenticated remote attacker to trigger a device reload, causing a DoS. The root cause is insufficient validation of user-supp...

CVE-2020-3554

CVE-2020-3554 affects Cisco ASA and FTD TCP packet processing due to a memory exhaustion condition, allowing unauthenticated remote DoS via high-rate crafted TCP traffic. Real-world impact per sources: potential exhaustion of device resources and DoS for transit traffic. Connected advisories conf...

CVE-2021-40117

CVE-2021-40117 affects Cisco ASA and Firepower Threat Defense (FTD) Software. The issue is in the SSL/TLS message handler where incoming packets are not properly processed, allowing an unauthenticated remote attacker to trigger a reload of the device and cause a denial-of-service (DoS). Exploitat...

CVE-2023-20042

CVE-2023-20042 affects Cisco ASA/FTD AnyConnect SSL VPN. The root cause is an implementation error in the SSL/TLS session handling that can prevent the release of a session handler, enabling an unauthenticated attacker to send crafted SSL/TLS traffic and exhaust the session handler pool, leading ...

CVE-2020-3304

CVE-2020-3304 affects Cisco ASA and Firepower Threat Defense (FTD) web interfaces. The issue stems from improper HTTP input validation, allowing an unauthenticated, remote attacker to craft an HTTP request that can trigger a reload of the affected device, causing a DoS. Impact is limited to the w...

CVE-2018-15383

Cisco ASA and Firepower Threat Defense (FTD) software are affected by CVE-2018-15383 due to a vulnerability in the cryptographic hardware accelerator driver. The issue arises from limited DMA memory and improper handling of resources under low-memory conditions, which an unauthenticated remote at...

CVE-2020-3583

CVE-2020-3583 describes cross-site scripting vulnerabilities in Cisco ASA/FTD Web Services interface due to insufficient validation of user input. A remote, unauthenticated attacker could entice a user to click a crafted link to execute arbitrary script in the interface context or access browser-...

CVE-2019-15992

CVE-2019-15992 is a remote code execution vulnerability in the Lua interpreter used by Cisco ASA and Cisco FTD software. It arises from insufficient restrictions on Lua function calls in user-supplied scripts, which could allow an authenticated, remote attacker to trigger a heap overflow and exec...

CVE-2021-1573

Cisco CVE-2021-1573 affects the web services interface of ASA Software and FTD Software. An unauthenticated remote attacker can trigger a DoS by sending crafted HTTPS requests, due to improper input validation when parsing HTTPS requests, causing the device to reload. Affected products: Cisco ASA...

CVE-2018-15454

CVE-2018-15454 affects the SIP inspection engine in Cisco ASA Software and Cisco FTD Software. The root cause is improper handling of SIP traffic, allowing an unauthenticated, remote attacker to trigger high CPU usage or reload the device, leading to DoS. Public sources describe this as a SIP par...

CVE-2020-3581

CVE-2020-3581 covers multiple cross-site scripting (XSS) vulnerabilities in the web services interface of Cisco ASA and FTD software. The flaws arise from insufficient validation of user-supplied input in the web services interface, allowing an unauthenticated, remote attacker to persuade a user ...

CVE-2021-1445

Cisco ASA/FTD Web Services VPN DoS vulnerabilities stem from improper input validation of HTTPS requests. An unauthenticated, remote attacker can exploit this by sending a crafted HTTPS request to an affected device, potentially causing a reload and a DoS condition. Affected products include Cisc...

CVE-2024-20329

CVE-2024-20329 (Cisco ASA SSH RCE) involves an authenticated remote command-injection vulnerability in the SSH subsystem of Cisco ASA software. The root cause is insufficient validation of user input when executing remote CLI commands over SSH. Exploitation could allow a limited-privilege user to...

CVE-2017-6752

The CVE-2017-6752 issue affects Cisco ASA Web UI for versions 9.3(3) and 9.6(2). It stems from the interaction between LDAP and SSL Connection Profile, enabling an unauthenticated remote attacker to enumerate valid usernames via the device IP. This information disclosure stems from username enume...

CVE-2018-0229

CVE-2018-0229 affects Cisco AnyConnect Secure Mobility Client, ASA, and FTD software configured for SAML 2.0-based SSO. Root cause: ASA/FTD fail to detect if an authentication request originates from the AnyConnect client, enabling a session-fixation path where a user’s IdP authentication token c...

CVE-2018-15465

CVE-2018-15465 affects Cisco ASA software, where the authorization subsystem fails to properly validate user privileges in the web management interface. An authenticated but unprivileged user (levels 0/1) can issue specific HTTPS requests to perform privileged actions, potentially exposing sensit...

CVE-2022-20924

CVE-2022-20924 affects Cisco ASA and Cisco Firepower Threat Defense (FTD) software with SNMP. Root cause is insufficient input validation in the SNMP handling, enabling an authenticated, remote attacker to trigger device reloads and a DoS condition. Affected products include Cisco ASA/FTD; exploi...

CVE-2023-20264

Cisco ASA/FTD SAML SSO implementation flaw allows an unauthenticated attacker to intercept a user’s SAML assertion during remote VPN authentication due to insufficient login URL validation. An attacker can entice a user to visit a site under the attacker’s control, modify the login URL, and use t...

CVE-2024-20355

CVE-2024-20355 affects Cisco ASA/FTD SAML SSO. The issue stems from improper separation of authorization domains, allowing an authenticated remote user to reuse a SAML token to access a tunnel group they are not authorized for, enabling a remote VPN session to secured networks behind the device. ...

CVE-2019-1714

CVE-2019-1714 affects Cisco ASA and Cisco Firepower Threat Defense (FTD) software, where the SAML 2.0 SSO implementation has improper credential handling for NTLM or basic authentication. An unauthenticated, remote attacker could open a VPN session after another user has authenticated via SAML SS...

CVE-2020-3564

CVE-2020-3564 affects Cisco ASA/FTD FTP inspection engine. Root cause: ineffective flow tracking of FTP traffic allows an unauthenticated, remote attacker to bypass FTP inspection and complete FTP connections. Affected products include Cisco ASA Software and Cisco FTD Software. In practice, explo...

CVE-2021-34793

CVE-2021-34793 is a DoS vulnerability in Cisco ASA/FTD software (transparent mode) due to improper handling of certain TCP segments by the TCP Normalizer, allowing an unauthenticated remote attacker to poison MAC address tables and disrupt networks. Affected products include Cisco ASA and Cisco F...

CVE-2010-4670

CVE-2010-4670 describes a DoS in the IPv6 Neighbor Discovery implementation on Cisco ASA 5500 series (software 8.2(3) and earlier) and Cisco PIX appliances. The vulnerability is triggered by malicious Router Advertisement floods from varying source addresses, exploiting the ND handling to cause C...

CVE-2020-3436

The CVE-2020-3436 vulnerability affects Cisco ASA/FTD Web Services: an unauthenticated attacker can upload arbitrarily large files to specific folders, triggering a watchdog timeout and an unexpected device reload (DoS) due to inefficient handling of large file writes. Affected products are Cisco...

CVE-2020-3561

CVE-2020-3561 affects Cisco ASA/FTD WebVPN (Clientless SSL VPN). The issue is a result of improper input sanitization that enables unauthenticated, remote CRLF header injection when a user is lured to click a crafted link, allowing arbitrary HTTP headers to be injected and potential redirection. ...

CVE-2021-40118

CVE-2021-40118 affects Cisco ASA/FTD web services. The vulnerability arises from improper input validation when parsing HTTPS requests, allowing an unauthenticated, remote attacker to trigger a DoS condition by sending a malicious HTTPS request, potentially causing the device to reload. The issue...

CVE-2011-0396

CVE-2011-0396 affects Cisco ASA 5500 Series devices with ASA software versions 8.0 before 8.0(5.23), 8.1 before 8.1(2.49), 8.2 before 8.2(4.1), and 8.3 before 8.3(2.13). When a Certificate Authority (CA) is configured, remote attackers could read arbitrary files via unspecified vectors. This vuln...

CVE-2015-4458

CVE-2015-4458 affects Cisco ASA and related products where the Cavium cryptographic-module TLS code fails to verify the MAC field. The root cause is an error in the Cavium firmware that allows a remote attacker to modify TLS packets without detection, enabling MITM content spoofing. Connected sou...

CVE-2017-12246

The CVE-2017-12246 entry concerns Cisco Adaptive Security Appliance (ASA) Software. Root cause: incomplete input validation of HTTP headers in the Direct Authentication feature. A remote, unauthenticated attacker can trigger a crafted HTTP request to the device’s local IP, causing the ASA to relo...

CVE-2024-20293

CVE-2024-20293 describes a logic error in Cisco ASA and Firepower Threat Defense (FTD) Software where ACLs switch from inactive to active in the running configuration. This can let an unauthenticated, remote attacker bypass configured ACL protections, potentially granting access to trusted networ...

CVE-2020-3167

CVE-2020-3167 covers a CLI command injection vulnerability in Cisco FXOS Software and Cisco UCS Manager Software. The issue stems from insufficient input validation in CLI commands, allowing an authenticated, local attacker to inject crafted arguments and execute arbitrary OS commands with the pr...

CVE-2020-3373

Cisco ASA software and Firepower Threat Defense (FTD) are affected by CVE-2020-3373: an IP fragment-handling memory leak caused by improper error handling during IP fragment reassembly. An unauthenticated remote attacker could send crafted fragmented IPv4/IPv6 traffic to exhaust memory, degrade t...

CVE-2018-15399

This CVE (CVE-2018-15399) affects Cisco ASA/FTD TCP Syslog: a missing boundary check in the internal function allows an unauthenticated, remote attacker in MITM position to modify syslog TCP segments, exhausting 1550-byte buffers and causing DoS. Impacted features include AnyConnect SSL VPN, clie...

CVE-2019-12678

The CVE-2019-12678 issue affects Cisco ASA/FTD SIP inspection: an unauthenticated remote attacker can send malicious SIP packets to trigger an integer underflow in the SIP parsing module, causing the device to read unmapped memory and crash. Root cause: improper SIP message parsing in the SIP ins...

CVE-2022-20928

CVE-2022-20928 describes a VPN authorization bypass in Cisco ASA/FTD where a flaw in the VPN authentication flow’s authorization verifications allows an unauthenticated remote attacker (with valid credentials) to establish a VPN session as a different user. The impact is privilege propagation wit...

CVE-2012-0356

CVE-2012-0356 affects Cisco ASA 5500 series and ASASM, plus the FWSM on Catalyst 6500, when multicast routing is enabled. The vulnerability arises from improper handling of PIM messages, potentially allowing a remote attacker to trigger a device reload. Affected software ranges include ASA/ASASM ...

CVE-2018-0240

CVE-2018-0240 affects Cisco ASA/FTD Application Layer Protocol Inspection. The vulnerability stems from logical errors in the inspection logic, allowing an unauthenticated, remote attacker to send high volumes of malicious traffic and trigger a deadlock that reloads the device (DoS). Affected sof...

CVE-2018-0242

The CVE-2018-0242 issue affects Cisco ASA WebVPN (Web-based management interface). It is a cross-site scripting (XSS) vulnerability caused by insufficient validation of user-supplied input in the WebVPN login/management interface. An unauthenticated, remote attacker can lure a user to click a cra...

CVE-2019-12698

Cisco ASA Software and Cisco FTD WebVPN CPU Denial of Service (CVE-2019-12698) allows unauthenticated remote attackers to trigger high CPU by repeated WebVPN HTTP page requests, causing DoS. Affected ASA/FTD versions are mitigated by Cisco software updates; there are no supported workarounds per ...

CVE-2019-15256

CVE-2019-15256 affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software in the IKEv1 feature. The root cause is improper management of system memory, allowing an unauthenticated, remote attacker to send malicious IKEv1 traffic and trigger a reload, causing a DoS. The attack do...

CVE-2019-1713

CVE-2019-1713 is a CSRF vulnerability in the Cisco ASA web-based management interface. It arises from insufficient CSRF protections, enabling an unauthenticated, remote attacker to coax a logged-in user into following a malicious link and perform arbitrary actions with that user’s privileges. If ...

CVE-2021-1422

CVE-2021-1422 affects Cisco ASA Software Release 9.16.1 and Cisco FTD Software Release 7.0.0. The issue is a logic error in the software cryptography module that handles certain decryption errors over an established IPsec connection, causing an abnormal device reload and a DoS. The vulnerability’...