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CVE-2017-3831

31
FAUCET Score

CVE-2017-3831 is a critical authentication bypass vulnerability in the web-based GUI of Cisco Mobility Express 1800 Series Access Points running software versions prior to 8.2.110.0. An unauthenticated, remote attacker can exploit this flaw by sending a crafted HTTP request, gaining full administrator privileges. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, allowing for complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
8.1\(15.14\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.1\(15.14\):*:*:*:*:*:*:*
8.1\(112.3\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.1\(112.3\):*:*:*:*:*:*:*
8.1\(112.4\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.1\(112.4\):*:*:*:*:*:*:*
8.1\(131.0\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.1\(131.0\):*:*:*:*:*:*:*

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
5.27%
Probability of exploitation in next 30 days
EPSS Percentile
91.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0527 is in the 86th percentile among its peer group of 36,862 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)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-ap1800
Vendor Advisory
securityfocus.com / bid/96909
Third Party AdvisoryVDB Entry