CVE-2020-28175: There is a local privilege escalation vulnerability in Alfredo Milani Comparetti SpeedFan 4.52

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HIGH 7.8DOWNGRADE

CVE-2020-28175 is a high-severity flaw (CVSS 7.8) affecting speedfan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There is a local privilege escalation vulnerability in Alfredo Milani Comparetti SpeedFan 4.52. Attackers can use constructed programs to increase user privileges

Why this priority

High severity
Public exploit reference

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	0.5% (top 58%)
CISA exploited list	No
Published	2020-12-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: almico

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

Am I affected?

Timeline

2020-12-03 18:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

almico speedfan DOWNGRADE

Affected: 4.52

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.52

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.52 (Debian / Ubuntu)

apt-cache madison speedfan sudo apt install speedfan=<VERSION_BEFORE_4.52> sudo apt-mark hold speedfan

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

dnf --showduplicates list speedfan sudo dnf downgrade speedfan-<VERSION_BEFORE_4.52> sudo dnf versionlock add speedfan

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-2020-28175?

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

Is CVE-2020-28175 being exploited?

CVE-2020-28175 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-2020-28175 affect?

CVE-2020-28175 affects speedfan. Severity is high (CVSS 7.8). There is a local privilege escalation vulnerability in Alfredo Milani Comparetti SpeedFan 4.52. Attackers can use constructed programs to increase user privileges

How urgent is CVE-2020-28175?

Priority 43/100. High severity; Public exploit reference

References

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