How severe is CVE-2018-8273?

CVE-2018-8273 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8273?

CVE-2018-8273 primarily affects Microsoft Sql Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8273?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-8273 published?

CVE-2018-8273 was published on 2018-08-15 and last updated on 2026-06-17.

CVE-2018-8273

CVE-2018-8273 is a critical-severity vulnerability in Microsoft Sql Server with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 29% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 29% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Microsoft Sql Server
Published: 2018-08-15
Last modified: 2026-06-17

Description

A buffer overflow vulnerability exists in the Microsoft SQL Server that could allow remote code execution on an affected system, aka "Microsoft SQL Server Remote Code Execution Vulnerability." This affects Microsoft SQL Server.

Frequently asked questions

What is CVE-2018-8273?: A buffer overflow vulnerability exists in the Microsoft SQL Server that could allow remote code execution on an affected system, aka "Microsoft SQL Server Remote Code Execution Vulnerability." This affects Microsoft SQL Server.
How severe is CVE-2018-8273?: CVE-2018-8273 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8273?: CVE-2018-8273 primarily affects Microsoft Sql Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8273?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-8273 published?: CVE-2018-8273 was published on 2018-08-15 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:microsoft:sql_server:2016:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:sql_server:2016:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:sql_server:2017:*:*:*:*:*:x64:*

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