PatchTheCVECVE-2026-77482: Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
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HIGH 8.8WATCHLISTUPGRADEUPGRADE
CVE-2026-77482 is a high-severity flaw (CVSS 8.8) affecting sql server 2017, sql server 2019. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 43%) |
| CISA exploited list | No |
| Weakness | CWE-122 |
| Published | 2026-09-08 |
| Last modified | 2026-09-15 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Last updated 2026-09-15 · 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 sql server 2017 UPGRADE
Affected: < 14.0.2130.4 · >= 14.0.3006.16 and < 14.0.3550.4
Fixed in: 14.0.2130.4, 14.0.3550.4
Safe to downgrade to: a release before 14.0.3006.16
1. Check installed version
apt-cache policy sql-server-2017 || rpm -q sql-server-2017 || sql-server-2017 --version
2. UPGRADE to 14.0.2130.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sql-server-2017
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sql-server-2017
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 14.0.3006.16 (Debian / Ubuntu)
apt-cache madison sql-server-2017
sudo apt install sql-server-2017=<VERSION_BEFORE_14.0.3006.16>
sudo apt-mark hold sql-server-2017
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list sql-server-2017
sudo dnf downgrade sql-server-2017-<VERSION_BEFORE_14.0.3006.16>
sudo dnf versionlock add sql-server-2017
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 sql server 2019 UPGRADE
Affected: < 15.0.2190.7 · >= 15.0.4003.23 and < 15.0.4490.9
Fixed in: 15.0.2190.7, 15.0.4490.9
Safe to downgrade to: a release before 15.0.4003.23
1. Check installed version
apt-cache policy sql-server-2019 || rpm -q sql-server-2019 || sql-server-2019 --version
2. UPGRADE to 15.0.2190.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade sql-server-2019
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade sql-server-2019
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 15.0.4003.23 (Debian / Ubuntu)
apt-cache madison sql-server-2019
sudo apt install sql-server-2019=<VERSION_BEFORE_15.0.4003.23>
sudo apt-mark hold sql-server-2019
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list sql-server-2019
sudo dnf downgrade sql-server-2019-<VERSION_BEFORE_15.0.4003.23>
sudo dnf versionlock add sql-server-2019
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-2026-77482?
sql server 2017: upgrade to 14.0.2130.4, 14.0.3550.4; sql server 2019: upgrade to 15.0.2190.7, 15.0.4490.9. Exact commands for each OS are on this page.
Is CVE-2026-77482 being exploited?
CVE-2026-77482 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-2026-77482 affect?
CVE-2026-77482 affects sql server 2017, sql server 2019. Severity is high (CVSS 8.8). Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
How urgent is CVE-2026-77482?
Priority 50/100. High severity; On your watchlist
Software pages
Microsoft SQL Server vulnerabilities
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