CVE-2016-20050: NetSchedScan 1.0 contains a buffer overflow vulnerability in the scan Hostname/IP field that allows local atta

Routine

MEDIUM 6.2DOWNGRADE

CVE-2016-20050 is a medium-severity flaw (CVSS 6.2) affecting netschedscan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NetSchedScan 1.0 contains a buffer overflow vulnerability in the scan Hostname/IP field that allows local attackers to crash the application by supplying an oversized input string. Attackers can paste a crafted payload containing 388 bytes of data followed by 4 bytes of EIP overwrite into the Hostname/IP field to trigger a denial of service condition.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-04
Last modified	2026-07-20

Publisher (CNA): VulnCheck · Vendor: mcafee

Last updated 2026-07-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-04 14:16 UTCPublished CVE record published
2026-07-20 20:10 UTCUpdated Record last modified

mcafee netschedscan DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy netschedscan || rpm -q netschedscan || netschedscan --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison netschedscan sudo apt install netschedscan=<VERSION_BEFORE_1.0> sudo apt-mark hold netschedscan

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list netschedscan sudo dnf downgrade netschedscan-<VERSION_BEFORE_1.0> sudo dnf versionlock add netschedscan

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-20050?

netschedscan: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-20050 being exploited?

CVE-2016-20050 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-20050 affect?

CVE-2016-20050 affects netschedscan. Severity is medium (CVSS 6.2). NetSchedScan 1.0 contains a buffer overflow vulnerability in the scan Hostname/IP field that allows local attackers to crash the application by supplying an oversized input string. Attackers can paste a crafted payload containing 388 bytes

How urgent is CVE-2016-20050?

Priority 28/100. Public exploit reference

Software pages

McAfee vulnerabilities

References

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