CVE-2026-73025: Windows iSCSI Security Feature Bypass Vulnerability
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.9%
EPSS score, percentile 59.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- from 10.0.14393.0 to before 10.0.14393.9512
- from 10.0.17763.0 to before 10.0.17763.9245
- from 6.2.9200.0 to before 6.2.9200.26349
- from 6.2.9200.0 to before 6.2.9200.26349
- from 6.3.9600.0 to before 6.3.9600.23398
- from 6.3.9600.0 to before 6.3.9600.23398
and 7 more in the table below
Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 10.0.14393.0 to before 10.0.14393.9512 |
| Status | Versions |
|---|---|
| Affected | from 10.0.17763.0 to before 10.0.17763.9245 |
| Status | Versions |
|---|---|
| Affected | from 6.2.9200.0 to before 6.2.9200.26349 |
| Status | Versions |
|---|---|
| Affected | from 6.2.9200.0 to before 6.2.9200.26349 |
| Status | Versions |
|---|---|
| Affected | from 6.3.9600.0 to before 6.3.9600.23398 |
| Status | Versions |
|---|---|
| Affected | from 6.3.9600.0 to before 6.3.9600.23398 |
| Status | Versions |
|---|---|
| Affected | from 10.0.14393.0 to before 10.0.14393.9512 |
| Status | Versions |
|---|---|
| Affected | from 10.0.14393.0 to before 10.0.14393.9512 |
| Status | Versions |
|---|---|
| Affected | from 10.0.17763.0 to before 10.0.17763.9245 |
| Status | Versions |
|---|---|
| Affected | from 10.0.17763.0 to before 10.0.17763.9245 |
| Status | Versions |
|---|---|
| Affected | from 10.0.20348.0 to before 10.0.20348.5622 |
| Status | Versions |
|---|---|
| Affected | from 10.0.26100.0 to before 10.0.26100.33438 |
| Status | Versions |
|---|---|
| Affected | from 10.0.26100.0 to before 10.0.26100.33438 |
Source: CVE List, as of . About the data.
About this vulnerability
Weak authentication in Windows iSCSI allows an unauthorized attacker to bypass a security feature over a network.
Summary: CVE record, as of .
- CISA has not added CVE-2026-73025 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
- The CVE record was published on 8 Sep 2026.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.9% (percentile 59.6), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact total.
Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.
Description
Windows iSCSI Security Feature Bypass Vulnerability
Weak authentication in Windows iSCSI allows an unauthorized attacker to bypass a security feature over a network.
Source: CVE List, as of . About the data.
Weakness
CWE-1390
- CWE-1390: Weak Authentication
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
Known exploited Microsoft vulnerabilities
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- CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability