CVE-2024-39817: Insertion of sensitive information into sent data issue exists in Cybozu Office 10.0.0 to 10.8.6, which may al

Routine

MEDIUM 6.5UPGRADE

CVE-2024-39817 is a medium-severity flaw (CVSS 6.5) affecting office. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Insertion of sensitive information into sent data issue exists in Cybozu Office 10.0.0 to 10.8.6, which may allow a user who can login to the product to view data that the user does not have access by conducting 'search' under certain conditions in Custom App.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-200
Published	2024-08-06
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2024-08-06 05:15 UTCPublished CVE record published
2026-06-17 07:42 UTCUpdated Record last modified

cybozu office UPGRADE

Affected: >= 10.0.0 and < 10.8.7

Fixed in: 10.8.7

Safe to downgrade to: a release before 10.0.0

1. Check installed version

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

2. UPGRADE to 10.8.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade office

Note

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

3. If no update is available yet, DOWNGRADE to a release before 10.0.0 (Debian / Ubuntu)

apt-cache madison office sudo apt install office=<VERSION_BEFORE_10.0.0> sudo apt-mark hold office

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list office sudo dnf downgrade office-<VERSION_BEFORE_10.0.0> sudo dnf versionlock add office

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-2024-39817?

office: upgrade to 10.8.7. Exact commands for each OS are on this page.

Is CVE-2024-39817 being exploited?

CVE-2024-39817 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-2024-39817 affect?

CVE-2024-39817 affects office. Severity is medium (CVSS 6.5). Insertion of sensitive information into sent data issue exists in Cybozu Office 10.0.0 to 10.8.6, which may allow a user who can login to the product to view data that the user does not have access by conducting 'search' under certain condi

How urgent is CVE-2024-39817?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2026-32190 HIGH 8.4 MITIGATE DOWNGRADE Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
CVE-2026-32189 HIGH 7.8 MITIGATE DOWNGRADE Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-32188 HIGH 7.1 MITIGATE DOWNGRADE Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-32200 HIGH 7.8 MITIGATE DOWNGRADE Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
CVE-2026-32198 HIGH 7.8 MITIGATE DOWNGRADE Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

References

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