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CVE-2017-6653

20
FAUCET Score

CVE-2017-6653 describes a denial-of-service vulnerability in the TCP throttling process of the Cisco Identity Services Engine (ISE) GUI, specifically version 2.1(0.474). An unauthenticated, remote attacker can exploit this by sending a high rate of TCP connections to the GUI, causing it to become unresponsive. Rated 7.5 HIGH on CVSSv3, this vulnerability has a low attack complexity and high impact on availability, requiring no user interaction or privileges. There is no known exploit intelligence, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.1\(0.474\)CPE matchmatch criteria
cpe:2.3:a:cisco:identity_services_engine:2.1\(0.474\):*:*:*:*:*:*:*

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
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 65th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

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-20170517-ise
Vendor Advisory
securityfocus.com / bid/98536
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038516