How severe is CVE-2020-3260?

CVE-2020-3260 has a CVSS 3.x base score of 6.5, 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 high.

Is CVE-2020-3260 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3260?

CVE-2020-3260 primarily affects Cisco Aironet 1542i Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3260?

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

When was CVE-2020-3260 published?

CVE-2020-3260 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-3260

CVE-2020-3260 is a medium-severity vulnerability in Cisco Aironet 1542i Firmware with a CVSS 3.x base score of 6.5. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Cisco Aironet 1542i Firmware
Published: 2020-04-15
Last modified: 2026-06-17

Description

A vulnerability in Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper processing of client packets that are sent to an affected access point (AP). An attacker could exploit this vulnerability by sending a large number of sustained client packets to the affected AP. A successful exploit could allow the attacker to cause the affected AP to crash, resulting in a DoS condition.

Frequently asked questions

What is CVE-2020-3260?: A vulnerability in Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper processing of client packets that are sent to an affected access point (AP). An attacker could exploit this vulnerability by sending a large number of sustained client packets to the affected AP. A successful exploit could allow the attacker to cause the affected AP to crash, resulting in a DoS condition.
How severe is CVE-2020-3260?: CVE-2020-3260 has a CVSS 3.x base score of 6.5, 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 high.
Is CVE-2020-3260 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3260?: CVE-2020-3260 primarily affects Cisco Aironet 1542i Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3260?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3260 published?: CVE-2020-3260 was published on 2020-04-15 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-dos-5ZLs6ESz

Affected products (6)

cpe:2.3:o:cisco:aironet_1542i_firmware:8.9\(100.0\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1542d_firmware:8.9\(100.0\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1815_firmware:8.9\(100.0\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1830_firmware:8.9\(100.0\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1840_firmware:8.9\(100.0\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1850_firmware:8.9\(100.0\):*:*:*:*:*:*:*

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