{"vulnerability": "cve-2021-1134", "sightings": [{"uuid": "48cc410b-f162-410d-b6e4-c07d18918420", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1134", "type": "seen", "source": "https://t.me/cibsecurity/25772", "content": "\u203c CVE-2021-1134 \u203c\n\nA vulnerability in the Cisco Identity Services Engine (ISE) integration feature of the Cisco DNA Center Software could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data. The vulnerability is due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and an ISE server. An attacker could exploit this vulnerability by supplying a crafted certificate and could then intercept communications between the ISE and DNA Center. A successful exploit could allow the attacker to view and alter sensitive information that the ISE maintains about clients that are connected to the network.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-06-29T07:28:20.000000Z"}, {"uuid": "fc14d08f-0358-4838-915b-e0915f89e54c", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1134", "type": "seen", "source": "https://t.me/hacking_Attack/13350", "content": ".\n\nThe issue tracked as CVE-2021-1543, meanwhile, allows cross-site scripting from an unauthenticated, remote attacker (CVSS score: 6.1).\n\n\u201cThis vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected device,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by persuading a user to click a malicious link and access a specific page. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information and redirect the user to an arbitrary page.\u201d\n\nAnd finally, CVE-2021-1571\u00a0(rating 6.1 on the CVSSscale) could allow an unauthenticated, remote attacker to conduct a HTML injection attack.\n\n\u201cThis vulnerability is due to improper checks of parameter values in affected pages,\u201d according to the advisory. \u201cAn 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.\u201d See Also: Jeff Moss, aka Dark Tangent, the person who founded DEF CON and Black Hat Cisco\u2019s Other High-Severity Security HolesThe other high-severity bugs that Cisco addressed on Wednesday include the certificate-validation vulnerability (CVE-2021-1566) in the Cisco Email Security Appliance (ESA) and Cisco Web Security Appliance (WSA). It exists in the way the Cisco Advanced Malware Protection (AMP) for Endpoints integrates Cisco AsyncOS. If exploited, the bug could allow an unauthenticated, remote attacker to intercept traffic between an affected device and the AMP servers. It rates 7.4 on the 10-point CVSS bug-severity scale.\n\n\u201cThis vulnerability is due to improper certificate validation when an affected device establishes TLS connections,\u201d according to the advisory. \u201cA man-in-the-middle attacker could exploit this vulnerability by sending a crafted TLS packet to an affected device. A successful exploit could allow the attacker to spoof a trusted host and then extract sensitive information or alter certain API requests.\u201d\n\nThe bug (CVE-2021-1134) in the Cisco DNA Center, a network controller and management dashboard, also rates 7.4. It exists in the Cisco Identity Services Engine (ISE) integration feature of the software, and could also allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data.\n\n\u201cThe vulnerability is due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and an ISE server,\u201d according to the advisory. \u201cAn attacker could exploit this vulnerability by supplying a crafted certificate and could then intercept communications between the ISE and DNA Center. A successful exploit could allow the attacker to view and alter sensitive information that the ISE maintains about clients that are connected to the network.\u201d\n\nAnd finally, a vulnerability (CVE-2021-1567) in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack.\n\nIt\u2019s only exploitable if the VPN Posture (HostScan) Module is installed on the AnyConnect client, and it carries a 7.0 CVSS rating. VPN Posture helps to gather information about what operating system, antivirus, antispyware and other installed software is present on remote hosts, and it performs endpoint assessment while allowing a connection to the VPN.\n\n\u201cThis vulnerability is due to a race condition in the signature verification process for DLL files that are loaded on an affected device,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by sending a series of crafted interprocess communication (IPC) messages to the AnyConnect process. A successful exploit could allow the attacker to exe[...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:02:35.686110Z"}, {"uuid": "1dfb37d6-d19e-416d-bd88-7739855bec51", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1134", "type": "seen", "source": "https://t.me/hacking_Attack/13348", "content": "Black Hat Ethical Hacking\nCisco Smart Switches Riddled with Severe Security Holes\n\nhttps://www.blackhatethicalhacking.com/wp-content/uploads/2017/11/black-hat-locks-and-electronics.jpg Cisco Smart Switches Riddled with Severe Security HolesPost Views: 60 \nReading Time: 1 Minute\nCisco has flagged and patched several high-severity security vulnerabilities in its Cisco Small Business 220 Series Smart Switches that could allow session hijacking, arbitrary code execution, cross-site scripting and HTML injection.\nIt also issued fixes for high-severity problems in the AnyConnect secure mobility client, the Cisco DNA Center and the Cisco Email Security Appliance, along with a slew of patches for medium-severity vulnerabilities in AnyConnect, Jabber, Meeting Server, Unified Intelligence Center and Webex.\n\nThe high-severity issues are as follows:\n\n* CVE-2021-1566:\u00a0Cisco Email Security Appliance and Cisco Web Security Appliance (Certificate-Validation Vulnerability)\n* CVE-2021-1134:\u00a0Cisco DNA Center (Certificate Validation Vulnerability)\n* CVE-2021-1541 through 1543; CVE-2021-1571:\u00a0Cisco Small Business 220 Series Smart Switches (Session Hijacking, Arbitrary Code-Execution, Cross-Site Scripting, HTML Injection)\n* CVE-2021-1567:\u00a0Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module (DLL Hijacking)\n\nThe most severe issue in this crop of patches is tracked as CVE-2021-1542, in the Cisco Small Business 220 Series Smart Switches. These are entry-level switches that act as the basic building blocks for small- and medium-sized business networks. They\u2019re responsible for sharing network resources and connecting various clients, including computers, printers and servers, to the network and each other, along with security, governing network performance and more.\nSee Also: RockYou2021: largest password compilation of all time leaked online \u2013 8.4 billion entries The bug rates 7.5 on the 10-point CVSS vulnerability-severity scale, and arises from weak session management for the web-based management interface of the switches. An unauthenticated, remote attacker could use it to bypass authentication protections and gain unauthorized access to the interface, according to the advisory. The attacker could then obtain the privileges of the highjacked session account, which could include administrative privileges, and thus gain free rein on the switch.\n\n\u201cThis vulnerability is due to the use of weak session management for session identifier values,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by using reconnaissance methods to determine how to craft a valid session identifier. A successful exploit could allow the attacker [to] take actions within the management interface with privileges up to the level of the administrative user.\u201d Multiple Patches for Smart SwitchesThere are also multiple other security flaws in the same web-management interface. For instance, the bug tracked as CVE-2021-1541\u00a0is an arbitrary code-execution vulnerability that would allow an authenticated, remote attacker to execute arbitrary commands as a root user on the underlying operating system.\n\n\u201cThis vulnerability is due to a lack of parameter validation for TFTP configuration parameters,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by entering crafted input for specific TFTP configuration parameters. A successful exploit could allow the attacker to execute arbitrary commands as a root user on the underlying operating system.\u201d\nSee Also: Offensive Security Tool: CloudFail The attacker must have valid administrative credentials on the device in order to exploit the issue, so the CVSS score comes in at 7.2 rather than critical[...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:02:35.834793Z"}, {"uuid": "e6ff417a-f6cb-417f-bfcd-12f9e3899406", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1134", "type": "seen", "source": "https://t.me/hacking_Attack/13350", "content": ".\n\nThe issue tracked as CVE-2021-1543, meanwhile, allows cross-site scripting from an unauthenticated, remote attacker (CVSS score: 6.1).\n\n\u201cThis vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected device,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by persuading a user to click a malicious link and access a specific page. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information and redirect the user to an arbitrary page.\u201d\n\nAnd finally, CVE-2021-1571\u00a0(rating 6.1 on the CVSSscale) could allow an unauthenticated, remote attacker to conduct a HTML injection attack.\n\n\u201cThis vulnerability is due to improper checks of parameter values in affected pages,\u201d according to the advisory. \u201cAn 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.\u201d See Also: Jeff Moss, aka Dark Tangent, the person who founded DEF CON and Black Hat Cisco\u2019s Other High-Severity Security HolesThe other high-severity bugs that Cisco addressed on Wednesday include the certificate-validation vulnerability (CVE-2021-1566) in the Cisco Email Security Appliance (ESA) and Cisco Web Security Appliance (WSA). It exists in the way the Cisco Advanced Malware Protection (AMP) for Endpoints integrates Cisco AsyncOS. If exploited, the bug could allow an unauthenticated, remote attacker to intercept traffic between an affected device and the AMP servers. It rates 7.4 on the 10-point CVSS bug-severity scale.\n\n\u201cThis vulnerability is due to improper certificate validation when an affected device establishes TLS connections,\u201d according to the advisory. \u201cA man-in-the-middle attacker could exploit this vulnerability by sending a crafted TLS packet to an affected device. A successful exploit could allow the attacker to spoof a trusted host and then extract sensitive information or alter certain API requests.\u201d\n\nThe bug (CVE-2021-1134) in the Cisco DNA Center, a network controller and management dashboard, also rates 7.4. It exists in the Cisco Identity Services Engine (ISE) integration feature of the software, and could also allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data.\n\n\u201cThe vulnerability is due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and an ISE server,\u201d according to the advisory. \u201cAn attacker could exploit this vulnerability by supplying a crafted certificate and could then intercept communications between the ISE and DNA Center. A successful exploit could allow the attacker to view and alter sensitive information that the ISE maintains about clients that are connected to the network.\u201d\n\nAnd finally, a vulnerability (CVE-2021-1567) in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack.\n\nIt\u2019s only exploitable if the VPN Posture (HostScan) Module is installed on the AnyConnect client, and it carries a 7.0 CVSS rating. VPN Posture helps to gather information about what operating system, antivirus, antispyware and other installed software is present on remote hosts, and it performs endpoint assessment while allowing a connection to the VPN.\n\n\u201cThis vulnerability is due to a race condition in the signature verification process for DLL files that are loaded on an affected device,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by sending a series of crafted interprocess communication (IPC) messages to the AnyConnect process. A successful exploit could allow the attacker to exe[...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-02T01:03:12.174783Z"}, {"uuid": "c16d694f-79d0-42f7-adbb-b2a450146848", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1134", "type": "seen", "source": "https://t.me/hacking_Attack/13348", "content": "Black Hat Ethical Hacking\nCisco Smart Switches Riddled with Severe Security Holes\n\nhttps://www.blackhatethicalhacking.com/wp-content/uploads/2017/11/black-hat-locks-and-electronics.jpg Cisco Smart Switches Riddled with Severe Security HolesPost Views: 60 \nReading Time: 1 Minute\nCisco has flagged and patched several high-severity security vulnerabilities in its Cisco Small Business 220 Series Smart Switches that could allow session hijacking, arbitrary code execution, cross-site scripting and HTML injection.\nIt also issued fixes for high-severity problems in the AnyConnect secure mobility client, the Cisco DNA Center and the Cisco Email Security Appliance, along with a slew of patches for medium-severity vulnerabilities in AnyConnect, Jabber, Meeting Server, Unified Intelligence Center and Webex.\n\nThe high-severity issues are as follows:\n\n* CVE-2021-1566:\u00a0Cisco Email Security Appliance and Cisco Web Security Appliance (Certificate-Validation Vulnerability)\n* CVE-2021-1134:\u00a0Cisco DNA Center (Certificate Validation Vulnerability)\n* CVE-2021-1541 through 1543; CVE-2021-1571:\u00a0Cisco Small Business 220 Series Smart Switches (Session Hijacking, Arbitrary Code-Execution, Cross-Site Scripting, HTML Injection)\n* CVE-2021-1567:\u00a0Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module (DLL Hijacking)\n\nThe most severe issue in this crop of patches is tracked as CVE-2021-1542, in the Cisco Small Business 220 Series Smart Switches. These are entry-level switches that act as the basic building blocks for small- and medium-sized business networks. They\u2019re responsible for sharing network resources and connecting various clients, including computers, printers and servers, to the network and each other, along with security, governing network performance and more.\nSee Also: RockYou2021: largest password compilation of all time leaked online \u2013 8.4 billion entries The bug rates 7.5 on the 10-point CVSS vulnerability-severity scale, and arises from weak session management for the web-based management interface of the switches. An unauthenticated, remote attacker could use it to bypass authentication protections and gain unauthorized access to the interface, according to the advisory. The attacker could then obtain the privileges of the highjacked session account, which could include administrative privileges, and thus gain free rein on the switch.\n\n\u201cThis vulnerability is due to the use of weak session management for session identifier values,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by using reconnaissance methods to determine how to craft a valid session identifier. A successful exploit could allow the attacker [to] take actions within the management interface with privileges up to the level of the administrative user.\u201d Multiple Patches for Smart SwitchesThere are also multiple other security flaws in the same web-management interface. For instance, the bug tracked as CVE-2021-1541\u00a0is an arbitrary code-execution vulnerability that would allow an authenticated, remote attacker to execute arbitrary commands as a root user on the underlying operating system.\n\n\u201cThis vulnerability is due to a lack of parameter validation for TFTP configuration parameters,\u201d according to Cisco. \u201cAn attacker could exploit this vulnerability by entering crafted input for specific TFTP configuration parameters. A successful exploit could allow the attacker to execute arbitrary commands as a root user on the underlying operating system.\u201d\nSee Also: Offensive Security Tool: CloudFail The attacker must have valid administrative credentials on the device in order to exploit the issue, so the CVSS score comes in at 7.2 rather than critical[...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-02T01:03:12.288109Z"}]}