CVE-2015-0903: Buffer overflow in Saitoh Kikaku Maruo Editor 8.51 and earlier allows remote attackers to execute arbitrary co

Q: How do I fix CVE-2015-0903?

editor: upgrade to newer than 8.51. Exact commands for each OS are on this page.

Q: Is CVE-2015-0903 being exploited?

CVE-2015-0903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-0903 affect?

CVE-2015-0903 affects editor. Severity is high (CVSS 7.5). Buffer overflow in Saitoh Kikaku Maruo Editor 8.51 and earlier allows remote attackers to execute arbitrary code via a crafted .hmbook file.

This month

HIGH 7.5UPGRADE

CVE-2015-0903 is a high-severity flaw (CVSS 7.5) affecting editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Saitoh Kikaku Maruo Editor 8.51 and earlier allows remote attackers to execute arbitrary code via a crafted .hmbook file.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Weakness	CWE-119
Published	2015-04-03
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: hidemaru

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

Am I affected?

Timeline

2015-04-03 10:59 UTCPublished CVE record published
2026-06-17 00:21 UTCUpdated Record last modified

hidemaru editor UPGRADE

Affected: <= 8.51 · 8.00 · 8.01 · 8.01 a · 8.02 · 8.03 · 8.04 · 8.10

Fixed in: newer than 8.51

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 8.51 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade editor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade editor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2015-0903?

editor: upgrade to newer than 8.51. Exact commands for each OS are on this page.

Is CVE-2015-0903 being exploited?

CVE-2015-0903 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-2015-0903 affect?

CVE-2015-0903 affects editor. Severity is high (CVSS 7.5). Buffer overflow in Saitoh Kikaku Maruo Editor 8.51 and earlier allows remote attackers to execute arbitrary code via a crafted .hmbook file.

How urgent is CVE-2015-0903?

Priority 48/100. High severity

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References

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