CVE-2021-42852
CVE-2021-42852 is a high-severity vulnerability in Lenovo A1 Firmware 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-78.
Key facts
- Severity: High (CVSS 3.x base score 8.0)
- CVSS v2: 7.7
- EPSS exploit prediction: 1% (52nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-78
- Affected product: Lenovo A1 Firmware
- Published:
- Last modified:
Description
A command injection vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an authenticated user to execute operating system commands by sending a crafted packet to the device.
Frequently asked questions
- What is CVE-2021-42852?
- A command injection vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an authenticated user to execute operating system commands by sending a crafted packet to the device.
- How severe is CVE-2021-42852?
- CVE-2021-42852 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 low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-42852 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42852?
- CVE-2021-42852 primarily affects Lenovo A1 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-42852?
- 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-2021-42852 published?
- CVE-2021-42852 was published on 2022-05-18 and last updated on 2026-06-17.
References
Affected products (5)
- cpe:2.3:o:lenovo:a1_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lenovo:t1_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lenovo:x1_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lenovo:t2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lenovo:t2pro_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Lenovo A1 Firmware
- CVE-2021-42850 — High (CVSS 8.8): A weak default administrator password for the web interface and serial port was reported in some Lenovo Personal Cloud…
- CVE-2021-42849 — Medium (CVSS 6.8): A weak default password for the serial port was reported in some Lenovo Personal Cloud Storage devices that could allow…
- CVE-2021-42851 — Medium (CVSS 6.3): A vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an unauthenticated user to…
- CVE-2021-42848 — Medium (CVSS 4.3): An information disclosure vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow an…
All CVEs affecting Lenovo A1 Firmware →
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