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CVE-2016-9221

14
FAUCET Score

CVE-2016-9221 describes a Denial of Service vulnerability in Cisco Mobility Express 2800 and 3800 Series Access Points when configured in 40 MHz local mode, affecting 802.11 ingress connection authentication. An unauthenticated, adjacent attacker can exploit this to cause authentication failures. The vulnerability has a CVSSv3 score of 4.3 (Medium), indicating a low-impact attack requiring adjacent network access with low complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.2\(121.12\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.2\(121.12\):*:*:*:*:*:*:*
8.4\(1.82\)CPE matchmatch criteria
cpe:2.3:o:cisco:aironet_access_point_software:8.4\(1.82\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 67th percentile among its peer group of 1,802 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, 0.0 Mastodon, and 0.1 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-20170118-cme2
Vendor Advisory
securityfocus.com / bid/95631
Third Party AdvisoryVDB Entry