CVE-2015-6305

CVE-2015-6305 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-426.

Key facts

• Severity: High (CVSS 2.0 base score 7.2)
• EPSS exploit prediction: 1% (65th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-426
• Affected product: Cisco Anyconnect Secure Mobility Client
• Published: 2015-09-26
• Last modified: 2026-06-17

Description

Untrusted search path vulnerability in the CMainThread::launchDownloader function in vpndownloader.exe in Cisco AnyConnect Secure Mobility Client 2.0 through 4.1 on Windows allows local users to gain privileges via a Trojan horse DLL in the current working directory, as demonstrated by dbghelp.dll, aka Bug ID CSCuv01279. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-4211.

Frequently asked questions

What is CVE-2015-6305?

Untrusted search path vulnerability in the CMainThread::launchDownloader function in vpndownloader.exe in Cisco AnyConnect Secure Mobility Client 2.0 through 4.1 on Windows allows local users to gain privileges via a Trojan horse DLL in the current working directory, as demonstrated by dbghelp.dll, aka Bug ID CSCuv01279. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-4211.

How severe is CVE-2015-6305?

CVE-2015-6305 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2015-6305 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6305?

CVE-2015-6305 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6305?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6305 published?

CVE-2015-6305 was published on 2015-09-26 and last updated on 2026-06-17.

References

• http://packetstormsecurity.com/files/133876/Cisco-AnyConnect-Secure-Mobility-Client-3.1.08009-Privilege-Elevation.html
• http://seclists.org/fulldisclosure/2015/Sep/80
• http://tools.cisco.com/security/center/viewAlert.x?alertId=41136
• http://www.securitytracker.com/id/1033643
• https://code.google.com/p/google-security-research/issues/detail?id=460
• https://www.exploit-db.com/exploits/38289/

Affected products (51)

• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.0.0343:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.1.0.148:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.0133:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.0136:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.0140:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.0185:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.0254:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.1003:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.2016:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.0202:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.1012:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.0217:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2006:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2010:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2011:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2014:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2017:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2018:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2019:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3041:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3046:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3051:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3054:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3055:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5_base:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.0629:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.1047:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.2052:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.3050:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.3054:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.4235:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.5075:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.5080:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.09231:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.09266:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0.09353:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.1\(60\):*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.1.02043:*:*:*:*:*:*:*

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