9.8

CVE-2026-54117: microsoft microsoft sql server 2025 (cu 6) Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalUndergoing analysis
Published 14-07-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-54117 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in microsoft microsoft sql server 2025 (cu 6). EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.53%
0%100%
Low · +0.37 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.53%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

+0.37 pp

From 1.16% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft7 products

1 vendor · 7 products

References

1 links