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CVE-2016-1481

27
FAUCET Score

CVE-2016-1481 is a denial-of-service vulnerability in Cisco AsyncOS Software for Email Security Appliances, affecting both virtual and hardware appliances configured with specific email message filter rules. An unauthenticated, remote attacker can exploit this flaw to disrupt service. With a CVSS score of 7.5 (High), it has a low attack complexity and requires no user interaction, leading to a high impact on availability. While no public exploit code or active exploitation has been observed, it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.5.0-000CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance:8.5.0-000:*:*:*:*:*:*:*
8.5.0-er1-198CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance:8.5.0-er1-198:*:*:*:*:*:*:*
8.5.6-052CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance:8.5.6-052:*:*:*:*:*:*:*
8.5.6-073CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance:8.5.6-073:*:*:*:*:*:*:*
8.5.6-074CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance:8.5.6-074:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.02%
Probability of exploitation in next 30 days
EPSS Percentile
86.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0302 is in the 75th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 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-20161026-esa1
Vendor Advisory
securityfocus.com / bid/93908
securitytracker.com / id/1037123