How severe is CVE-2016-9220?

CVE-2016-9220 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2016-9220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9220?

CVE-2016-9220 affects Cisco Aironet Access Point Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-9220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-9220 published?

CVE-2016-9220 was published on 2017-01-26 and last updated on 2026-06-17.

CVE-2016-9220

CVE-2016-9220 is a medium-severity vulnerability in Cisco Aironet Access Point Software with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 3.3
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Aironet Access Point Software
Published: 2017-01-26
Last modified: 2026-06-17

Description

A Denial of Service Vulnerability in 802.11 ingress packet processing of the Cisco Mobility Express 2800 and 3800 Access Points (APs) could allow an unauthenticated, adjacent attacker to cause the connection table to be full of invalid connections and be unable to process new incoming requests. More Information: CSCvb66659. Known Affected Releases: 8.2(130.0). Known Fixed Releases: 8.2(131.10) 8.2(131.6) 8.2(141.0) 8.3(104.56) 8.4(1.88) 8.4(1.91).

Frequently asked questions

What is CVE-2016-9220?: A Denial of Service Vulnerability in 802.11 ingress packet processing of the Cisco Mobility Express 2800 and 3800 Access Points (APs) could allow an unauthenticated, adjacent attacker to cause the connection table to be full of invalid connections and be unable to process new incoming requests. More Information: CSCvb66659. Known Affected Releases: 8.2(130.0). Known Fixed Releases: 8.2(131.10) 8.2(131.6) 8.2(141.0) 8.3(104.56) 8.4(1.88) 8.4(1.91).
How severe is CVE-2016-9220?: CVE-2016-9220 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2016-9220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9220?: CVE-2016-9220 affects Cisco Aironet Access Point Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-9220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-9220 published?: CVE-2016-9220 was published on 2017-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:aironet_access_point_software:8.2\(130.0\):*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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