MEDIUM
CVE-2026-42915
CWE-131Published: June 9, 2026· Updated: Jun 11, 2026
5.7
CVSS v3.1
Official Description
Incorrect calculation of buffer size in Windows TCP/IP allows an authorized attacker to deny service over an adjacent network.
Technical Analysis
CVE-2026-42915 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.7.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Microsoft8 products
windows 10 21h2windows 10 22h2windows 11 23h2windows 11 24h2windows 11 25h2windows 11 26h1windows server 2022windows server 2025
Source: NVD CPE · 8 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (1)
Quick Facts
CVE IDCVE-2026-42915
CVSS Score5.7 / 10
SeverityMEDIUM
WeaknessCWE-131
CISA KEVNo
Affected1 vendor
PublishedJun 9, 2026
Related CVEs (CWE-131)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-42915 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.