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| programming language =
| latest release version = {{Plainlist|
*'''Windows''': 5.0.07.0440<ref name="r5">[httphttps://www.cisco.com/web/software/282364316/47352/5.0.07.0440-rel-notes.txt VPN Client release notes]</ref> / {{release date and age|2011|3|15}}
*'''macOS''': 4.9.01.0180<ref>[httphttps://www.cisco.com/cisco/software/release.html?mdfid=281940729&flowid=4465&softwareid=282364316&os=Mac%20OS Cisco VPN Client v4.x … Mac OS]</ref> / {{release date and age|2009|02|05}}
}}
| latest release date = <!-- For the sake of formatting, just put dates above -->
| latest preview version = 4.9.01.0230 for Mac
| latest preview date = {{release date and age|2010|7|27}}
| operating system = [[Windows]], [[Mac OS X 10.4]] and [[Mac OS X 10.5|10.5]], [[Solaris (operating system)|Solaris UltraSPARC]], [[Linux]] (Intel)<ref name="hp">{{cite web|url=httphttps://www.cisco.com/en/US/products/sw/secursw/ps2308/|title=VPN Client Homepage}}</ref>
| language = English
| genre = [[Virtual private network|VPN software]]
* '''x86''': 7.63 MB
* '''x64''': 4.78 MB
}}
| website = {{URL|httphttps://www.cisco.com/c/en/us/products/security/vpn-endpoint-security-clients/index.html}}
}}
'''Cisco Systems VPN Client''' is a software application for connecting to a [[virtual private network]]. The client makes remote resources of another network available in a secure way as if the user were connected directly to that "private" network.
InOn July 29, 2011, Cisco announced the end of life of the product. No further product updates were released after July 30, 2012, and support ceased in July 29, 2014.<ref>httphttps://www.cisco.com/c/en/us/products/collateral/security/vpn-client/end_of_life_c51-680819.html</ref> The Support page with documentation links was taken down on July 30, 2016, replaced with the Obsolete Status Notification link (Seesee Alsoalso section, below). A suggested migration option for customers is the [[Cisco AnyConnect Secure Mobility Client]].<ref>[httphttps://www.cisco.com/c/en/USus/prodproducts/collateral/vpndevcsecurity/ps5743/ps5699/ps2308vpn-client/end_of_life_c51-680819.html End-of-Sale and End-of-Life Announcement for the Cisco VPN Client]</ref>
==Installation==
==Compatibility==
VPN Client 4.9.01.0230 beta added support for Mac OS X 10.6.<ref>[httphttps://www.cisco.com/web/software/282364316/35919/4.9.1.0230-beta-rel-notes.txt Release Notes for VPN Client, Release 4.9.01.0230 Beta for Mac OS X]</ref> Stable version 4.9.01.0180 appears to lack that support; 4.9.00.0050 explicitly did ''not'' support versions of Mac OS X later than 10.5.<ref>[httphttps://www.cisco.com/en/US/docs/security/vpn_client/cisco_vpn_client/vpn_client49/release/notes/49client.pdf Release Notes for VPN Client, Release 4.9.00.0050 for Mac OS X, Revised: May 21, 2010, OL-11179-04]</ref>
VPN Client 5.0.07.0290 added support for 64-bit versions of Windows Vista and Windows 7.<ref>[httphttps://www.cisco.com/en/US/docs/security/vpn_client/cisco_vpn_client/vpn_client5007/release/notes/vpnclient5007.html#wp84047 Release Notes for Cisco VPN Client, Release 5.0.07.0290]</ref>
==Security==
The client uses [[profile configuration file]]s (.pcf) that store VPN passwords either [[Cryptographiccryptographic hash function|hashed]] with [[type 7]], or stored as [[cleartextplaintext]]. A vulnerability has been identified,<ref name="cSec">{{cite web|url=httphttps://www.cisco.com/en/US/tech/tk583/tk372/technologies_security_notice09186a0080215981.html|title=Cisco Security Notice: Cisco IPsec VPN Implementation Group Password Usage Vulnerability}}</ref> and those passwords can easily be decoded using software or online services.<ref>{{cite web|url=http://www.unix-ag.uni-kl.de/~massar/bin/cisco-decode|title=Cisco Systems VPN Client Group Password Decoder}}</ref> To work around these issues, network administrators are advised to use the Mutual Group Authentication feature, or use unique passwords (that aren't related to other important network passwords).<ref name="cSec"/>
==References==
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