Trending
CVE-2026-20940

CVE detail

CVE-2026-20940

Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVSS 7.8 · HighBuzz score 11.9

Buzz score

Why this CVE is surfacing

Buzz score total 11.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 6.9 · diversity 5.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

6.9

1 evidence mentions in the snapshot

Diversity score

5.0

1 sources across 1 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

1 source links · newest first

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20940msrc.microsoft.com
No excerpt available.
Vendor Advisorymsrc.microsoft.comJan 13, 2026, 6:16 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

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Untrusted pointer dereference in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
CVSS 8.8 · High
CVE-2025-60719
Untrusted pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVSS 7.0 · High
CVE-2025-60703
Untrusted pointer dereference in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.
CVSS 7.8 · High
CVE-2025-59187
Improper input validation in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVSS 7.8 · High
CVE-2025-24990
Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems. This is an announcement of the upcoming…
CVSS 7.8 · High
KEV listed6 mentions
CVE-2025-55230
Untrusted pointer dereference in Windows MBT Transport driver allows an authorized attacker to elevate privileges locally.
CVSS 7.8 · High

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-20940.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:microsoft:windows_10_1607Search this product on Shodan
cpe:2.3:o:microsoft:windows_10_1809Search this product on Shodan
cpe:2.3:o:microsoft:windows_10_21h2Search this product on Shodan
cpe:2.3:o:microsoft:windows_10_22h2Search this product on Shodan
cpe:2.3:o:microsoft:windows_11_23h2Search this product on Shodan
cpe:2.3:o:microsoft:windows_server_2008Search this product on Shodan
cpe:2.3:o:microsoft:windows_server_2012Search this product on Shodan
cpe:2.3:o:microsoft:windows_server_2016Search this product on Shodan
cpe:2.3:o:microsoft:windows_server_2019Search this product on Shodan
cpe:2.3:o:microsoft:windows_server_2022Search this product on Shodan

Exact CVE query

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Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2026-20940Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Unavailable

Published

Jan 13, 2026

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): Low. The attacker needs basic user-level privileges.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses