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Cisco Secure Client / AnyConnect Security Advisories & Vulnerabilities

Recent Cisco PSIRT advisories affecting Secure Client (formerly AnyConnect) endpoint VPN. Search, check severity and CVSS, and get a remediation or refresh quote from an authorized Cisco partner.

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9 recent advisories affecting Cisco Secure Client / AnyConnect

  • Cisco Meraki MX and Z Series AnyConnect VPN with Client Certificate Authentication Denial of Service Vulnerability

    High · CVSS 8.6
    CVE-2025-20271Published Jun 18, 2025cisco-sa-meraki-mx-vpn-dos-sM5GCfm7

    Affected: Cisco Meraki MX Firmware

  • Cisco Meraki MX and Z Series AnyConnect VPN Denial of Service Vulnerability

    High · CVSS 7.7
    CVE-2025-20212Published Apr 2, 2025cisco-sa-meraki-mx-vpn-dos-vNRpDvfb

    Affected: Cisco Meraki MX Firmware

  • Cisco Secure Client for Windows with Secure Firewall Posture Engine DLL Hijacking Vulnerability

    High · CVSS 7.1
    CVE-2025-20206Published Mar 5, 2025cisco-sa-secure-dll-injection-AOyzEqSg

    Affected: Cisco Secure Client

  • Cisco Meraki MX and Z Series Teleworker Gateway AnyConnect VPN Denial of Service Vulnerabilities

    High · CVSS 8.6
    CVE-2024-20498, CVE-2024-20499, CVE-2024-20500, CVE-2024-20501 +2Published Oct 2, 2024cisco-sa-meraki-mx-vpn-dos-QTRHzG2

    Affected: Cisco Meraki MX Firmware

  • Cisco Secure Client Carriage Return Line Feed Injection Vulnerability

    High · CVSS 8.2
    CVE-2024-20337Published Mar 6, 2024cisco-sa-secure-client-crlf-W43V4G7

    Affected: Cisco Secure Client

  • Cisco Secure Client for Linux with ISE Posture Module Privilege Escalation Vulnerability

    High · CVSS 7.3
    CVE-2024-20338Published Mar 6, 2024cisco-sa-secure-privesc-sYxQO6ds

    Affected: Cisco Secure Client

  • Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows Privilege Escalation Vulnerability

    High · CVSS 7.8
    CVE-2023-20178Published Jun 7, 2023cisco-sa-ac-csc-privesc-wx4U4Kw

    Affected: Cisco AnyConnect Secure Mobility Client

  • Cisco AnyConnect Secure Mobility Client for Linux and Mac OS with VPN Posture (HostScan) Module Shared Library Hijacking Vulnerability

    High · CVSS 7
    CVE-2021-34788Published Oct 6, 2021cisco-sa-anyconnect-lib-hija-cAFB7x4q

    Affected: Cisco AnyConnect Secure Mobility Client

  • Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability

    High · CVSS 7
    CVE-2021-1567Published Jun 16, 2021cisco-sa-anyconnect-pos-dll-ff8j6dFv

    Affected: Cisco AnyConnect Secure Mobility Client

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Frequently asked questions

What are the latest Cisco Secure Client / AnyConnect security advisories?

This page lists recent Cisco security advisories affecting Cisco Secure Client / AnyConnect, from the Cisco PSIRT openVuln feed, with severity, CVSS, and CVEs. Confirm the affected software versions against what you run.

How do I fix a Cisco Secure Client / AnyConnect vulnerability?

Most Cisco vulnerabilities are fixed by upgrading to a patched software release or applying the documented mitigation. If the platform is end-of-life, the remedy is a refresh. Uniqcli, an authorized Cisco partner, scopes the patch or replacement and can quote it TAA-compliant and GPC-payable.

Is Cisco Secure Client / AnyConnect still supported?

Security fixes are only available while a product is supported. Check our Cisco end-of-life lookup to confirm the Last Date of Support, then patch (if supported) or plan a refresh with Uniqcli.

Data from the Cisco PSIRT openVuln API, shown for reference; Cisco’s official advisories are authoritative. Cisco and PSIRT are trademarks of Cisco Systems, Inc.; Uniqcli LLC is an independent authorized Cisco partner.