VulnerabilityModified

CVE-2016-6399

Cisco ACE30 Application Control Engine Module through A5 3.3 and ACE 4700 Application Control Engine appliances through A5 3.3 allow remote attackers to cause a denial of service (device reload) via crafted (1) SSL or (2) TLS packets, aka Bug ID…

HIGH 7.5EPSS 1.94%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 1.94% probability · 80th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-20
Affected: cisco/ace application control engine module a1 · cisco/ace application control engine module a3 · cisco/ace application control engine module a4 · cisco/ace application control engine module a5 · cisco/ace 4700 series application control engine appliance · cisco/ace 4700 series application control engine appliance a1 · cisco/ace 4700 series application control engine appliance a3 · cisco/ace 4700 series application control engine appliance a4 · cisco/ace 4700 series application control engine appliance a5
Source: psirt@cisco.com

EPSS trend

EPSS 1.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.