CVE-2021-42686
CVE-2021-42686 is a high-severity vulnerability in Accops Hyworks Windows Client with a CVSS 3.x base score of 8.8. 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-190.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 7.2
- EPSS exploit prediction: 0% (38th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-190
- Affected product: Accops Hyworks Windows Client
- Published:
- Last modified:
Description
An Integer Overflow exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22001B in the Accops HyWorks Windows Client prior to v 3.2.8.200 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.
Frequently asked questions
- What is CVE-2021-42686?
- An Integer Overflow exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22001B in the Accops HyWorks Windows Client prior to v 3.2.8.200 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.
- How severe is CVE-2021-42686?
- CVE-2021-42686 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-42686 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42686?
- CVE-2021-42686 affects Accops Hyworks Windows Client. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42686?
- 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-2021-42686 published?
- CVE-2021-42686 was published on 2021-12-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:accops:hyworks_windows_client:*:*:*:*:*:*:*:*
More vulnerabilities in Accops Hyworks Windows Client
- CVE-2021-42688 — High (CVSS 8.8): An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler…
- CVE-2021-42687 — High (CVSS 8.8): A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler…
- CVE-2021-42683 — High (CVSS 8.8): A Buffer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler…
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