What is the CVSS score of CVE-2021-42688?

CVE-2021-42688 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2021-42688?

Yes, a public proof-of-concept exploit is available for CVE-2021-42688. Prioritise patching immediately. EPSS: 0.5%.

Hyworks Windows Client CVE-2021-42688

HIGH

Integer Overflow or Wraparound (CWE-190)

2021-12-07 cve@mitre.org

Buffer Overflow RCE Microsoft Integer Overflow Denial Of Service Hyworks Windows Client

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Dec 07, 2021 - 21:15 nvd

HIGH 8.8

DescriptionNVD

An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22005B 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.

AnalysisAI

An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. An Integer Overflow vulnerability exists in Accops HyWorks Windows Client prior to v 3.2.8.200. The IOCTL Handler 0x22005B 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. Affected products include: Accops Hyworks Windows Client.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.