CVE-2012-5867: HT Editor 2.0.20 has a Remote Stack Buffer Overflow Vulnerability

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2012-5867 is a critical-severity flaw (CVSS 9.8) affecting ht editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HT Editor 2.0.20 has a Remote Stack Buffer Overflow Vulnerability

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-01-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ht editor project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-23 15:15 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

ht editor project ht editor DOWNGRADE

Affected: 2.0.20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.20

1. Check installed version

apt-cache policy ht-editor || rpm -q ht-editor || ht-editor --version

2. No fixed release: DOWNGRADE to a release before 2.0.20 (Debian / Ubuntu)

apt-cache madison ht-editor sudo apt install ht-editor=<VERSION_BEFORE_2.0.20> sudo apt-mark hold ht-editor

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

dnf --showduplicates list ht-editor sudo dnf downgrade ht-editor-<VERSION_BEFORE_2.0.20> sudo dnf versionlock add ht-editor

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-2012-5867?

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

Is CVE-2012-5867 being exploited?

CVE-2012-5867 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-2012-5867 affect?

CVE-2012-5867 affects ht editor. Severity is critical (CVSS 9.8). HT Editor 2.0.20 has a Remote Stack Buffer Overflow Vulnerability

How urgent is CVE-2012-5867?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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