CVE-2020-26132: An issue was discovered in Home DNS Server 0.10

Routine

HIGH 7.8DOWNGRADE

CVE-2020-26132 is a high-severity flaw (CVSS 7.8) affecting home dns server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Home DNS Server 0.10. Due to insufficient access restrictions in the default installation directory, an attacker can elevate privileges by replacing the HomeDNSServer.exe binary.

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-732
Published	2020-10-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: home dns server project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-28 18:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

home dns server project home dns server DOWNGRADE

Affected: 0.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.10

1. Check installed version

apt-cache policy home-dns-server || rpm -q home-dns-server || home-dns-server --version

2. No fixed release: DOWNGRADE to a release before 0.10 (Debian / Ubuntu)

apt-cache madison home-dns-server sudo apt install home-dns-server=<VERSION_BEFORE_0.10> sudo apt-mark hold home-dns-server

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

dnf --showduplicates list home-dns-server sudo dnf downgrade home-dns-server-<VERSION_BEFORE_0.10> sudo dnf versionlock add home-dns-server

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-2020-26132?

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

Is CVE-2020-26132 being exploited?

CVE-2020-26132 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-2020-26132 affect?

CVE-2020-26132 affects home dns server. Severity is high (CVSS 7.8). An issue was discovered in Home DNS Server 0.10. Due to insufficient access restrictions in the default installation directory, an attacker can elevate privileges by replacing the HomeDNSServer.exe binary.

How urgent is CVE-2020-26132?

Priority 34/100. High severity

References

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