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CVE-2018-0227

26
FAUCET Score

CVE-2018-0227 describes a vulnerability in Cisco ASA and FTD Software's SSL VPN Client Certificate Authentication feature. This flaw allows an unauthenticated, remote attacker to bypass certificate verification and establish an SSL VPN connection without a valid private key and certificate pair. With a CVSS score of 7.5 (High), the vulnerability has a low attack complexity and high impact on integrity, as it enables unauthorized access to the VPN. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for unauthorized network access warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.4.4, <= 9.4.4.13CPE matchmatch criteria
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
>= 9.5.3.7, <= 9.5.3.9CPE matchmatch criteria
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
>= 9.6.2.9, <= 9.6.2.21CPE matchmatch criteria
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
>= 9.6.3, <= 9.6.3.17CPE matchmatch criteria
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
9.4.3.1CPE matchmatch criteria
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.4.3.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
2.05%
Probability of exploitation in next 30 days
EPSS Percentile
79.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0205 is in the 63rd 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

ics-cert.us-cert.gov / advisories/ICSA-18-184-01
Third Party AdvisoryUS Government Resource
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-asa1
Vendor Advisory
securityfocus.com / bid/104018
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040723
Third Party AdvisoryVDB Entry