CVE-2015-6421

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-01-27 · updated 2026-06-17
Weakness: CWE-399

Description

cifs-ao in the CIFS optimization functionality on Cisco Wide Area Application Service (WAAS) and Virtual WAAS (vWAAS) devices 5.x before 5.3.5d and 5.4 and 5.5 before 5.5.3 allows remote attackers to cause a denial of service (resource consumption and device reload) via crafted network traffic, aka Bug ID CSCus85330.

Affected products

Cisco Wide Area Application Services: 5.1.1, 5.1.1a, 5.1.1b, 5.1.1c, 5.1.1d, 5.2.1 (+7)

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-waascifs
http://www.securitytracker.com/id/1034831
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-waascifs
http://www.securitytracker.com/id/1034831

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