Trending
CVE-2026-40414

CVE detail

CVE-2026-40414

Windows TCP/IP Denial of Service Vulnerability

CVSS 7.4 · HighBuzz score 17.5

Buzz score

Why this CVE is surfacing

Buzz score total 17.5

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 11.0 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

11.0

2 evidence mentions in the snapshot

Diversity score

6.5

2 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

2 source links · newest first

The May 2026 Security Update ReviewZero Day Initiative
take a closer look at some of the more interesting updates for this month, starting with a nasty-looking bug in DNS: - CVE-2026-41096 - Windows DNS Client Remote Code Execution Vulnerability This patch fixes a heap-based buffer overflow in the DNS Client triggered by a malicious DNS response. No authentication or user interaction needed, and since the
vendorwww.thezdi.comMay 12, 2026, 6:38 PM
CVE-2026-40414 Windows TCP/IP Denial of Service VulnerabilityMicrosoft MSRC
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an adjacent network.
vendormsrc.microsoft.comMay 12, 2026, 2:00 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

CVE-2026-40413
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2 mentions
CVE-2026-40401
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2 mentions
CVE-2026-26173
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to eleva…
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CVE-2026-25168
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CVE-2026-25165
Null pointer dereference in Windows Performance Counters allows an authorized attacker to elevate privileges locally.
CVSS 7.8 · High
2 mentions
CVE-2026-42903
Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.
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3 mentions

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-2026-40414.

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_11_24h2Search this product on Shodan
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cpe:2.3:o:microsoft:windows_11_26h1Search 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
cpe:2.3:o:microsoft:windows_server_2022_23h2Search this product on Shodan
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Exact CVE query

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Metadata

Canonical fields

NVD status

Modified

Published

May 12, 2026

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/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): Adjacent. The attacker must reach the same or an adjacent network.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Changed. Impacts can cross into a different security authority.
Confidentiality Impact (C): None. There is no direct impact to this security property.
Integrity Impact (I): None. There is no direct 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