CVE-2025-53783: Heap-based buffer overflow in Microsoft Teams allows an unauthorized attacker to execute code over a network.
45
This month
HIGH 7.5WATCHLISTUPGRADEUPGRADEUPGRADE
CVE-2025-53783 is a high-severity flaw (CVSS 7.5) affecting dynamics 365 guides, dynamics 365 remote assist, teams. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Heap-based buffer overflow in Microsoft Teams allows an unauthorized attacker to execute code over a network.
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
microsoft teams UPGRADE
Affected: < 1.0.0.2025102802
Fixed in: 1.0.0.2025102802
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy teams || rpm -q teams || teams --version
2. UPGRADE to 1.0.0.2025102802 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade teams
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade teams
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
microsoft teams UPGRADE
Affected: < 7.10.1
Fixed in: 7.10.1
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy teams || rpm -q teams || teams --version
2. UPGRADE to 7.10.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade teams
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade teams
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
microsoft teams UPGRADE
Affected: < 25122.1207.3700.1444
Fixed in: 25122.1207.3700.1444
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy teams || rpm -q teams || teams --version
2. UPGRADE to 25122.1207.3700.1444 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade teams
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade teams
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
microsoft teams UPGRADE
Affected: < 25122.1415.3698.6812
Fixed in: 25122.1415.3698.6812
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy teams || rpm -q teams || teams --version
2. UPGRADE to 25122.1415.3698.6812 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade teams
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade teams
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official sourceNVD · 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-2025-53783?
dynamics 365 guides: upgrade to 907.2505.29001.0; dynamics 365 remote assist: upgrade to 316.2505.28001; teams: upgrade to 1.0.0.2025102802. Exact commands for each OS are on this page.
Is CVE-2025-53783 being exploited?
CVE-2025-53783 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-2025-53783 affect?
CVE-2025-53783 affects dynamics 365 guides, dynamics 365 remote assist, teams. Severity is high (CVSS 7.5). Heap-based buffer overflow in Microsoft Teams allows an unauthorized attacker to execute code over a network.
PatchTheCVE