VIR Vulnerability Intelligence Relay

CVE-2015-6421

high
Published 2016-01-27 · Modified 2026-05-06
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
7.5

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.

Predictions

Exploit likelihood
83%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Application impact
VendorProductVersionsFixed
cisco ciscowide_area_application_services5.1.1
cisco ciscowide_area_application_services5.1.1a
cisco ciscowide_area_application_services5.1.1b
cisco ciscowide_area_application_services5.1.1c
cisco ciscowide_area_application_services5.1.1d
cisco ciscowide_area_application_services5.2.1
cisco ciscowide_area_application_services5.2_base
cisco ciscowide_area_application_services5.3.1
cisco ciscowide_area_application_services5.3.3
cisco ciscowide_area_application_services5.3.5
cisco ciscowide_area_application_services5.3.5a
cisco ciscowide_area_application_services5.3.5b
cisco ciscowide_area_application_services5.3.5c

References

CWEs

CWE-399

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.