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CVE-2018-15387

31
FAUCET Score

CVE-2018-15387 is a critical vulnerability in the Cisco SD-WAN Solution that allows an unauthenticated, remote attacker to bypass certificate validation. This flaw, stemming from improper certificate validation, enables an attacker to deploy a crafted system image by supplying one signed with a specially designed certificate. With a CVSS score of 9.8, this vulnerability poses a high risk of compromise to confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 17.2.0, < 17.2.8CPE matchmatch criteria
cpe:2.3:a:cisco:sd-wan:*:*:*:*:*:*:*:*
18.3.0CPE matchmatch criteria
cpe:2.3:a:cisco:sd-wan:18.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.10%
Probability of exploitation in next 30 days
EPSS Percentile
62.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0110 is in the 48th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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-20181003-sd-wan-bypass
Vendor Advisory
securityfocus.com / bid/105509
Third Party AdvisoryVDB Entry