How severe is CVE-2019-13321?

CVE-2019-13321 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-13321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-13321?

CVE-2019-13321 affects Mi Mi Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-13321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-13321 published?

CVE-2019-13321 was published on 2020-02-10 and last updated on 2026-06-17.

CVE-2019-13321

CVE-2019-13321 is a high-severity vulnerability in Mi Mi Browser with a CVSS 3.x base score of 8.0. 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-732.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 5.4
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Mi Mi Browser
Published: 2020-02-10
Last modified: 2026-06-17

Description

This vulnerability allows network adjacent attackers to execute arbitrary code on affected installations of Xiaomi Browser Prior to 10.4.0. User interaction is required to exploit this vulnerability in that the target must connect to a malicious access point. The specific flaw exists within the handling of HTTP responses to the Captive Portal. A crafted HTML response can cause the Captive Portal to to open a browser to a specified location without user interaction. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process. Was ZDI-CAN-7467.

Frequently asked questions

What is CVE-2019-13321?: This vulnerability allows network adjacent attackers to execute arbitrary code on affected installations of Xiaomi Browser Prior to 10.4.0. User interaction is required to exploit this vulnerability in that the target must connect to a malicious access point. The specific flaw exists within the handling of HTTP responses to the Captive Portal. A crafted HTML response can cause the Captive Portal to to open a browser to a specified location without user interaction. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process. Was ZDI-CAN-7467.
How severe is CVE-2019-13321?: CVE-2019-13321 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-13321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-13321?: CVE-2019-13321 affects Mi Mi Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-13321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-13321 published?: CVE-2019-13321 was published on 2020-02-10 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-19-659/

Affected products (1)

cpe:2.3:a:mi:mi_browser:*:*:*:*:*:*:*:*

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