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CVE-2017-3851

21
FAUCET Score

CVE-2017-3851 describes a Directory Traversal vulnerability in the Cisco application-hosting framework (CAF) component of Cisco IOx Releases 1.0.0.0 and 1.1.0.0. This allows an unauthenticated, remote attacker to read any file within the virtual instance by sending crafted requests due to insufficient input validation. The vulnerability has a CVSSv3 score of 7.5 (HIGH), indicating a network-based attack with low complexity and high confidentiality impact, though limited to the virtual instance. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.1\(0\)CPE matchmatch criteria
cpe:2.3:a:cisco:iox:1.1\(0\):*:*:*:*:*:*:*
1.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:iox:1.1.0:*:*:*:*:*:*:*

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:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.21%
Probability of exploitation in next 30 days
EPSS Percentile
91.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0521 is in the 85th percentile among its peer group of 51,485 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-20170322-caf1
Vendor Advisory
securityfocus.com / bid/97013
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038106
securitytracker.com / id/1038107