CVE-2026-97788

CVE-2026-97788 is a high-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• EPSS exploit prediction: 1% (52nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-203
• Affected product: Microsoft Windows 10 1607
• Published: 2026-10-13
• Last modified: 2026-10-16

Description

Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.

Frequently asked questions

What is CVE-2026-97788?

Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.

How severe is CVE-2026-97788?

CVE-2026-97788 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-97788 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-97788?

CVE-2026-97788 primarily affects Microsoft Windows 10 1607. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-97788?

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

When was CVE-2026-97788 published?

CVE-2026-97788 was published on 2026-10-13 and last updated on 2026-10-16.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97788

Affected products (33)

• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Windows 10 1607

• CVE-2026-57092 — Critical (CVSS 9.9): Use after free in Windows VMSwitch allows an authorized attacker to elevate privileges over a network.
• CVE-2026-97815 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.
• CVE-2026-97814 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.
• CVE-2026-97805 — Critical (CVSS 9.8): Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute code over a…
• CVE-2026-96934 — Critical (CVSS 9.8): Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
• CVE-2026-96924 — Critical (CVSS 9.8): Untrusted pointer dereference in Windows OLE allows an unauthorized attacker to execute code over a network.

All CVEs affecting Microsoft Windows 10 1607 →

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• CVE-2024-25714 — Critical (CVSS 9.8): In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel…
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Browse all CWE-203 (Observable Discrepancy) vulnerabilities →