CVSS9.8
Severitycritical
WeaknessCWE-121
EPSS0.97%61.7th percentile
Exploited1 KEV source
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
patch window
Called exploited 17 days after disclosure.
Measured from the CVE publication date to the earliest of 1 KEV catalogue that list it.
The life of this vulnerability
- CVE published
- First KEV listing17d
- Last sighting55d
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federaldoes not list it
- EUVDENISA, European Uniondoes not list it
- VulnCheck KEVcommercial researchlisted May 29, 2026
- CIRCLaggregator, mirrors the abovelisted Jun 2, 2026, not counted
Sources1 of 3
Listings differ by—
Strongest claimconfirmed
This rests on a single catalogue. No second catalogue corroborates the claim that it is being exploited. CIRCL is an aggregator and is not counted.
Public exploitation evidence
- reported exploitationwww.levelblue.com/blogs/spiderlabs-blog/ttp-briefing-q2-2026
- reported exploitationwww.recordedfuture.com/blog/june-2026-cve-landscape
- reported exploitationccb.belgium.be/advisories/warning-microsoft-patch-tuesday-ma
3 public reports collected from VulnCheck and CIRCL, first on May 29, 2026. Each links to its original source. We have not verified them.
Description
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.