CVE-2023-51598: Hancom Office Word DOC File Parsing Use-After-Free Remote Code Execution Vulnerability

This month

HIGH 8.8DOWNGRADE

CVE-2023-51598 is a high-severity flaw (CVSS 8.8) affecting office word. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Hancom Office Word DOC File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hancom Office Word. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of DOC files. The issue results from the lack of validating the exi

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-416
Published	2024-05-03
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: hancom

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

Am I affected?

Timeline

2024-05-03 03:16 UTCPublished CVE record published
2026-06-17 06:41 UTCUpdated Record last modified

hancom office word DOWNGRADE

Affected: 11.0.0.6914

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0.0.6914

1. Check installed version

apt-cache policy office-word || rpm -q office-word || office-word --version

2. No fixed release: DOWNGRADE to a release before 11.0.0.6914 (Debian / Ubuntu)

apt-cache madison office-word sudo apt install office-word=<VERSION_BEFORE_11.0.0.6914> sudo apt-mark hold office-word

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

dnf --showduplicates list office-word sudo dnf downgrade office-word-<VERSION_BEFORE_11.0.0.6914> sudo dnf versionlock add office-word

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-2023-51598?

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

Is CVE-2023-51598 being exploited?

CVE-2023-51598 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-2023-51598 affect?

CVE-2023-51598 affects office word. Severity is high (CVSS 8.8). Hancom Office Word DOC File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hancom Office Word. User interaction is required to ex

How urgent is CVE-2023-51598?

Priority 44/100. High severity

References

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