Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
Microsoft · Windows
A security feature bypass in Microsoft Windows affects the Mark of the Web and SmartScreen protections, which are meant to flag files downloaded from the internet. An attacker who can get a user to open a crafted file can bypass these protections, and the attack is reachable over the network with no authentication required but depends on the user interacting with the file.
Windows Mark of the Web Security Feature Bypass Vulnerability
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 1/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.How attackers get in
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited the day it was disclosed.
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
1 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order, 1 cited passage 1Defense Impairment
Bypasses Mark-of-the-Web protection mechanism
Windows Mark of the Web Security Feature Bypass Vulnerability
Detection
0 rules for this CVE · 6 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2024-38213 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Mark-of-the-Web BypassT1553.0056 general rules
- Suspicious Invoke-Item From Mount-DiskImagemediumtest
- Suspicious Unblock-Filemediumtest
- Windows AppX Deployment Full Trust Package Installationmediumexperimental
- Windows AppX Deployment Unsigned Package Installationmediumexperimental
- Suspicious Mount-DiskImagelowtest
- Windows MSIX Package Support Framework AI_STUBS Executionlowexperimental
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 30, 202629 Oct 2026
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- 44 more on OTX