PT-2026-7396 · Microsoft · Windows Shell+1

Msrc + 1 · Published 2026-02-10 · Updated 2026-05-30 · CVE-2026-21510

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Windows Shell (affected versions not specified)

Description A protection mechanism failure in the Windows Shell allows an unauthorized remote attacker to bypass security features, specifically the Windows SmartScreen mechanism and Windows Shell warnings. By convincing a user to open a specially crafted shortcut file (.LNK) or follow a malicious link, an attacker can execute arbitrary code on the system. This issue has been exploited in real-world incidents.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

BDU:2026-01630

CVE-2026-21510

Affected Products

Windows Shell

Windows

References · 79

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21510 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-21510 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-21510 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/729093 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-21510 · Security Note
• https://bdu.fstec.ru/vul/2026-01630 · Security Note
• https://securityweek.com/incomplete-windows-patch-opens-door-to-zero-click-attacks · Reddit Post
• https://t.me/avleonovcom/1636 · Telegram Post
• https://twitter.com/lyrie_ai/status/2059481236549120276 · Twitter Post
• https://reddit.com/r/PrivatePackets/comments/1r69n7a/february_security_report_zeroday_exploits_and · Reddit Post
• https://twitter.com/ScyScan/status/2021344552284717334 · Twitter Post
• https://twitter.com/ThreatSynop/status/2021552917140873617 · Twitter Post
• https://twitter.com/AmerAltaf88/status/2028425854032674876 · Twitter Post
• https://twitter.com/ZyberWallS/status/2021610901250383959 · Twitter Post