CVE-2018-3971

Name: CVE-2018-3971
Creator: NVD / NIST
Published: 2018-10-25T18:29:00.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2018-3971 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An exploitable arbitrary write vulnerability exists in the 0x2222CC IOCTL handler functionality of Sophos HitmanPro.Alert 3.7.6.744. A specially crafted IRP request can cause the driver to write data under controlled by an attacker address, resulting in memory corruption. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

An exploitable arbitrary write vulnerability exists in the 0x2222CC IOCTL handler functionality of Sophos HitmanPro.Alert 3.7.6.744. A specially crafted IRP request can cause the driver to write data under controlled by an attacker address, resulting in memory corruption. An attacker can send IRP request to trigger this vulnerability.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.54%

41.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-123

Affected Software

Vendor	Product	Versions
Sophos	Hitmanpro.Alert	3.7.6.744

References

http://www.securityfocus.com/bid/105743Broken Link, Third Party Advisory, VDB Entry
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0636Exploit, Third Party Advisory
http://www.securityfocus.com/bid/105743Broken Link, Third Party Advisory, VDB Entry
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0636Exploit, Third Party Advisory

Timeline

Published: Oct 25, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3971?

How severe is CVE-2018-3971?

CVE-2018-3971 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3971?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-3971?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST