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CVE-2016-6416

22
FAUCET Score

CVE-2016-6416 describes a denial-of-service vulnerability in the FTP service of Cisco AsyncOS on Email Security Appliance (ESA), Web Security Appliance (WSA), and Content Security Management Appliance (SMA) devices. An unauthenticated remote attacker can exploit this flaw by flooding the FTP service with traffic, leading to a denial of service. With a CVSS score of 5.9 (Medium), this vulnerability has a network attack vector and high attack complexity, but no impact on confidentiality or integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
9.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:content_security_management_appliance:9.1.0:*:*:*:*:*:*:*
9.1.0-004CPE matchmatch criteria
cpe:2.3:a:cisco:content_security_management_appliance:9.1.0-004:*:*:*:*:*:*:*
9.1.0-031CPE matchmatch criteria
cpe:2.3:a:cisco:content_security_management_appliance:9.1.0-031:*:*:*:*:*:*:*
9.1.0-033CPE matchmatch criteria
cpe:2.3:a:cisco:content_security_management_appliance:9.1.0-033:*:*:*:*:*:*:*
9.1.0-103CPE matchmatch criteria
cpe:2.3:a:cisco:content_security_management_appliance:9.1.0-103:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 64th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-aos
Vendor Advisory
securityfocus.com / bid/93198
securitytracker.com / id/1036915
securitytracker.com / id/1036916
securitytracker.com / id/1036917