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CVE-2017-17540

29
FAUCET Score

CVE-2017-17540 describes a critical vulnerability in Fortinet FortiWLC 8.3.3, stemming from a hardcoded account that grants attackers unauthorized read/write access via a remote shell. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the inherent risk remains high due to its simplicity and severe impact.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.0, <= 7.0.11CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*
>= 8.0, <= 8.3.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.08%
Probability of exploitation in next 30 days
EPSS Percentile
79.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0208 is in the 68th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

fortiguard.com / advisory/FG-IR-17-274
Vendor Advisory
securityfocus.com / bid/104119
Third Party AdvisoryVDB Entry