Security readout for executives and security teams
CVE-2017-3813 lets a local attacker on a Windows endpoint abuse Cisco AnyConnect Start Before Logon to run Internet Explorer as SYSTEM. That can turn local access into full machine control. It affects older AnyConnect Windows builds before Cisco’s fixed 4.4.00243 and 4.3.05017 releases. Exposure is limited to Windows systems running vulnerable Cisco AnyConnect Secure Mobility Client versions with the Start Before Logon module present. Organizations with legacy VPN client deployments, unmanaged laptops, or slow endpoint patching are the most likely to retain exposure. Treat this as a high-priority endpoint hygiene issue where legacy AnyConnect is present. It is local-only, but successful exploitation can grant SYSTEM-level control, making it relevant to ransomware staging, insider risk, and post-compromise privilege escalation. Mitigation focus: Inventory Windows endpoints running Cisco AnyConnect Secure Mobility Client.; Upgrade affected clients to Cisco’s fixed 4.4.00243 or 4.3.05017 releases or later.; Prioritize systems using Start Before Logon or shared pre-logon workflows..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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Open ATT&CK lookupCVE-2017-3813 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170208-anyconnectCVE reference · x_refsource_CONFIRM
- 41476CVE reference · exploit, x_refsource_EXPLOIT-DB
Products and packages named in the record
CWE details
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Permissions, Privileges, and Access Controls
Permissions, Privileges, and Access Controls represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.