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CVE-2017-6671

23
FAUCET Score

CVE-2017-6671 describes a vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) that allows unauthenticated, remote attackers to bypass email message scanning filters, specifically the Attachment Filter. With a CVSS score of 7.5 (HIGH), this vulnerability has a low attack complexity and could lead to high integrity impact, allowing malicious content to bypass security controls. While no public exploits, Metasploit modules, or Nuclei templates are available, and there's no evidence of active exploitation, affected organizations should upgrade to fixed releases 10.0.2-020 or 9.8.1-015 to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
9.7.1-066CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance_firmware:9.7.1-066:*:*:*:*:*:*:*
10.0.1-087CPE matchmatch criteria
cpe:2.3:a:cisco:email_security_appliance_firmware:10.0.1-087:*:*:*:*:*:*:*

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:H/A:N

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

Exploit Intelligence

EPSS Score
1.96%
Probability of exploitation in next 30 days
EPSS Percentile
78.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0196 is in the 62nd 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

No media coverage found for this CVE.

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-20170607-esa1
Vendor Advisory
securityfocus.com / bid/98969
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038635
Third Party AdvisoryVDB Entry