How severe is CVE-2020-3261?

CVE-2020-3261 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-3261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3261?

CVE-2020-3261 primarily affects Cisco Aironet 1542i Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3261?

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

When was CVE-2020-3261 published?

CVE-2020-3261 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-3261

CVE-2020-3261 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Cisco Aironet 1542i Firmware
Published: 2020-04-15
Last modified: 2026-06-17

Description

A vulnerability in the web-based management interface of Cisco Mobility Express Software could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack on an affected system. The vulnerability is due to insufficient CSRF protections for the web-based management interface on an affected device. An attacker could exploit this vulnerability by persuading a user with an active session on an affected device to follow a malicious link. A successful exploit could allow the attacker to perform arbitrary actions, including modifying the configuration, with the privilege level of the user.

Frequently asked questions

What is CVE-2020-3261?: A vulnerability in the web-based management interface of Cisco Mobility Express Software could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack on an affected system. The vulnerability is due to insufficient CSRF protections for the web-based management interface on an affected device. An attacker could exploit this vulnerability by persuading a user with an active session on an affected device to follow a malicious link. A successful exploit could allow the attacker to perform arbitrary actions, including modifying the configuration, with the privilege level of the user.
How severe is CVE-2020-3261?: CVE-2020-3261 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-3261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3261?: CVE-2020-3261 primarily affects Cisco Aironet 1542i Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3261 published?: CVE-2020-3261 was published on 2020-04-15 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mob-exp-csrf-b8tFec24

Affected products (34)

cpe:2.3:o:cisco:aironet_1542i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1542i_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1542d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1542d_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562i_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562e_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1562d_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1815_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1815_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1830_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1830_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1840_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1840_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1850_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_1850_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_2800i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_2800i_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_2800e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_2800e_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800i_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800e_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_3800p_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_4800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:aironet_4800_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:catalyst_iw6300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:catalyst_iw6300_firmware:8.10\(1.255\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:6300_series_access_points_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:6300_series_access_points_firmware:8.10\(1.255\):*:*:*:*:*:*:*

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