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CVE-2019-1851

23
FAUCET Score

CVE-2019-1851 is a medium-severity vulnerability in the External RESTful Services (ERS) API of Cisco Identity Services Engine (ISE). Due to incorrect role-based access control, an authenticated, remote attacker with administrative credentials could generate arbitrary certificates signed by the ISE Internal CA. This allows the attacker to create trusted certificates with arbitrary attributes, potentially enabling access to other certificate-protected networks or assets. While the CVSS score is 6.8, there is no known public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.2\(0.470\)CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.2\(0.470\):*:*:*:*:*:*:*
2.3\(0.298\)CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.3\(0.298\):*:*:*:*:*:*:*
2.4\(0.357\)CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.4\(0.357\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 69th percentile among its peer group of 3,565 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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-20190515-ise-certcreation
Vendor Advisory
securityfocus.com / bid/108356
Third Party AdvisoryVDB Entry