Buffer overwrite in ENS allowed to bypass AMSI protection

published 2020-04-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-28388

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

Buffer Overflow via Environment Variables vulnerability in AMSI component in McAfee Endpoint Security (ENS) Prior to 10.7.0 February 2020 Update allows local users to disable Endpoint Security via a carefully crafted user input.

Patch / fix

fixed in 1

McAfee LLC McAfee Endpoint Security (ENS) 10.7.0 April 2020 Update

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:N/I:P/A:N

Affected products

McAfee LLC McAfee Endpoint Security (ENS)

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120 Buffer Copy without Checking Size of Input

References

kc.mcafee.com /corporate/index?page=content&id=SB10309

Sources

CVE List CVE-2020-7261
NVD CVE-2020-7261

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary