How severe is CVE-2021-1143?

CVE-2021-1143 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-1143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-1143?

CVE-2021-1143 primarily affects Cisco Connected Mobile Experiences. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-1143?

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

When was CVE-2021-1143 published?

CVE-2021-1143 was published on 2021-01-13 and last updated on 2026-06-17.

CVE-2021-1143

CVE-2021-1143 is a medium-severity vulnerability in Cisco Connected Mobile Experiences 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Cisco Connected Mobile Experiences
Published: 2021-01-13
Last modified: 2026-06-17

Description

A vulnerability in Cisco Connected Mobile Experiences (CMX) API authorizations could allow an authenticated, remote attacker to enumerate what users exist on the system. The vulnerability is due to a lack of authorization checks for certain API GET requests. An attacker could exploit this vulnerability by sending specific API GET requests to an affected device. A successful exploit could allow the attacker to enumerate users of the CMX system.

Frequently asked questions

What is CVE-2021-1143?: A vulnerability in Cisco Connected Mobile Experiences (CMX) API authorizations could allow an authenticated, remote attacker to enumerate what users exist on the system. The vulnerability is due to a lack of authorization checks for certain API GET requests. An attacker could exploit this vulnerability by sending specific API GET requests to an affected device. A successful exploit could allow the attacker to enumerate users of the CMX system.
How severe is CVE-2021-1143?: CVE-2021-1143 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-1143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1143?: CVE-2021-1143 primarily affects Cisco Connected Mobile Experiences. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-1143 published?: CVE-2021-1143 was published on 2021-01-13 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cmxapi-KsKwCmfp

Affected products (3)

cpe:2.3:a:cisco:connected_mobile_experiences:10.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:connected_mobile_experiences:10.6.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:connected_mobile_experiences:10.6.2:*:*:*:*:*:*:*

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