VulnerabilityModified

CVE-2017-6653

HIGH 7.5EPSS 2.14%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability in the TCP throttling process for the GUI of the Cisco Identity Services Engine (ISE) 2.1(0.474) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device where the ISE GUI may fail to respond to new or established connection requests. The vulnerability is due to insufficient TCP rate limiting protection on the GUI. An attacker could exploit this vulnerability by sending the affected device a high rate of TCP connections to the GUI. An exploit could allow the attacker to cause the GUI to stop responding while the high rate of connections is in progress. Cisco Bug IDs: CSCvc81803.

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 2.14% probability · 82th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-399, CWE-770
Affected: cisco/identity services engine
Source: psirt@cisco.com

EPSS trend

EPSS 2.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

http://www.securityfocus.com/bid/98536Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038516
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170517-iseVendor Advisory
http://www.securityfocus.com/bid/98536Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038516
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170517-iseVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.