CVE-2019-12821
CVE-2019-12821 is a medium-severity vulnerability in Jisiwei I3 Firmware with a CVSS 3.x base score of 4.8. 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-330.
Key facts
- Severity: Medium (CVSS 3.x base score 4.8)
- CVSS v2: 5.8
- EPSS exploit prediction: 1% (57th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-330
- Affected product: Jisiwei I3 Firmware
- Published:
- Last modified:
Description
A vulnerability was found in the app 2.0 of the Shenzhen Jisiwei i3 robot vacuum cleaner, while adding a device to the account using a QR-code. The QR-code follows an easily predictable pattern that depends only on the specific device ID of the robot vacuum cleaner. By generating a QR-code containing information about the device ID, it is possible to connect an arbitrary device and gain full access to it. The device ID has an initial "JSW" substring followed by a six digit number that depends on the specific device.
Frequently asked questions
- What is CVE-2019-12821?
- A vulnerability was found in the app 2.0 of the Shenzhen Jisiwei i3 robot vacuum cleaner, while adding a device to the account using a QR-code. The QR-code follows an easily predictable pattern that depends only on the specific device ID of the robot vacuum cleaner. By generating a QR-code containing information about the device ID, it is possible to connect an arbitrary device and gain full access to it. The device ID has an initial "JSW" substring followed by a six digit number that depends on the specific device.
- How severe is CVE-2019-12821?
- CVE-2019-12821 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
- Is CVE-2019-12821 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-12821?
- CVE-2019-12821 affects Jisiwei I3 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-12821?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2019-12821 published?
- CVE-2019-12821 was published on 2019-07-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:jisiwei:i3_firmware:2.0:*:*:*:*:*:*:*
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