PatchTheCVECVE-2025-29822: Incomplete list of disallowed inputs in Microsoft Office OneNote allows an unauthorized attacker to bypass a s
47
This month
HIGH 7.8WATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE
CVE-2025-29822 is a high-severity flaw (CVSS 7.8) affecting office, office long term servicing channel, office long term servicing channel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Incomplete list of disallowed inputs in Microsoft Office OneNote allows an unauthorized attacker to bypass a security feature locally.
Why this priority
- High severity
- On your watchlist
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 | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 43%) |
| CISA exploited list | No |
| Weakness | CWE-184 |
| Published | 2025-04-08 |
| Last modified | 2026-06-17 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
microsoft office DOWNGRADE
Affected: 2019
Fixed in: no fixed release known
Safe to downgrade to: a release before 2019
1. Check installed version
apt-cache policy office || rpm -q office || office --version
2. No fixed release: DOWNGRADE to a release before 2019 (Debian / Ubuntu)
apt-cache madison office
sudo apt install office=<VERSION_BEFORE_2019>
sudo apt-mark hold office
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list office
sudo dnf downgrade office-<VERSION_BEFORE_2019>
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.
microsoft office long term servicing channel DOWNGRADE
Affected: 2021 · 2024
Fixed in: no fixed release known
Safe to downgrade to: a release before 2021
1. Check installed version
apt-cache policy office-long-term-servicing-channel || rpm -q office-long-term-servicing-channel || office-long-term-servicing-channel --version
2. No fixed release: DOWNGRADE to a release before 2021 (Debian / Ubuntu)
apt-cache madison office-long-term-servicing-channel
sudo apt install office-long-term-servicing-channel=<VERSION_BEFORE_2021>
sudo apt-mark hold office-long-term-servicing-channel
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list office-long-term-servicing-channel
sudo dnf downgrade office-long-term-servicing-channel-<VERSION_BEFORE_2021>
sudo dnf versionlock add office-long-term-servicing-channel
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.
microsoft office long term servicing channel DOWNGRADE
Affected: 2021 · 2024
Fixed in: no fixed release known
Safe to downgrade to: a release before 2021
1. Check installed version
apt-cache policy office-long-term-servicing-channel || rpm -q office-long-term-servicing-channel || office-long-term-servicing-channel --version
2. No fixed release: DOWNGRADE to a release before 2021 (Debian / Ubuntu)
apt-cache madison office-long-term-servicing-channel
sudo apt install office-long-term-servicing-channel=<VERSION_BEFORE_2021>
sudo apt-mark hold office-long-term-servicing-channel
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list office-long-term-servicing-channel
sudo dnf downgrade office-long-term-servicing-channel-<VERSION_BEFORE_2021>
sudo dnf versionlock add office-long-term-servicing-channel
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.
microsoft onenote MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy onenote || rpm -q onenote || onenote --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft onenote DOWNGRADE
Affected: 2016
Fixed in: no fixed release known
Safe to downgrade to: a release before 2016
1. Check installed version
apt-cache policy onenote || rpm -q onenote || onenote --version
2. No fixed release: DOWNGRADE to a release before 2016 (Debian / Ubuntu)
apt-cache madison onenote
sudo apt install onenote=<VERSION_BEFORE_2016>
sudo apt-mark hold onenote
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list onenote
sudo dnf downgrade onenote-<VERSION_BEFORE_2016>
sudo dnf versionlock add onenote
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.
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-2025-29822?
office: downgrade or apply the listed mitigation; office long term servicing channel: downgrade or apply the listed mitigation; office long term servicing channel: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2025-29822 being exploited?
CVE-2025-29822 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-2025-29822 affect?
CVE-2025-29822 affects office, office long term servicing channel, office long term servicing channel. Severity is high (CVSS 7.8). Incomplete list of disallowed inputs in Microsoft Office OneNote allows an unauthorized attacker to bypass a security feature locally.
How urgent is CVE-2025-29822?
Priority 47/100. High severity; On your watchlist
Software pages
Microsoft Office vulnerabilities
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