VulnerabilityModified

CVE-2017-3851

HIGH 7.5EPSS 5.21%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (5.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A Directory Traversal vulnerability in the web framework code of the Cisco application-hosting framework (CAF) component of the Cisco IOx application environment could allow an unauthenticated, remote attacker to read any file from the CAF in the virtual instance running on the affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by submitting crafted requests to the CAF web interface. The impacts of a successful exploit are limited to the scope of the virtual instance and do not impact the router that is hosting Cisco IOx. Cisco IOx Releases 1.0.0.0 and 1.1.0.0 are vulnerable. Cisco Bug IDs: CSCuy52302.

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 5.21% probability · 92th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-22
Affected: cisco/iox
Source: psirt@cisco.com

EPSS trend

EPSS moved from 4.0% on 21 September 2026 to 5.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

http://www.securityfocus.com/bid/97013Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038106
http://www.securitytracker.com/id/1038107
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-caf1Vendor Advisory
http://www.securityfocus.com/bid/97013Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038106
http://www.securitytracker.com/id/1038107
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-caf1Vendor Advisory

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