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Daily debrief · Sunday2026-09-13

Daily Intelligence Briefing — Sunday, September 13, 2026

7 critical9 high1 medium

On 2026-09-13, Threadlinqs published 14 new threat reports and updated 3, 7 rated critical and 9 high, spanning 179 MITRE ATT&CK techniques and 6 named threat actors. Coverage that day added 153 new detection rules and 398 extracted indicators.

New threats
143 updated
Critical / high
167 critical · 9 high
ATT&CK techniques
179Observed in the day’s reports
Threat actors
6Named in the reports
Indicators
398Count only · values are Red+
Detection rules
153New that day · rule text is Blue+

Edition date: · Last updated:

Summary & highlights

Sudo iptables NOPASSWD Misconfiguration Enables Local Privilege Escalation via Comment Injection. Passkey-Themed Help Desk Phishing Hijacks Microsoft 365 Cloud Accounts for Data Exfiltration. OAuth Client ID Spoofing Enables Stealthy Enumeration of Microsoft Entra ID Accounts (UNK_pyreq2323 / UNK_OutFlareAZ).

Highlights

  • TL-2026-2472 — Passkey-Themed Help Desk Phishing Hijacks Microsoft 365 Cloud Accounts for Data Exfiltration
  • TL-2026-2476 — OAuth Client ID Spoofing Enables Stealthy Enumeration of Microsoft Entra ID Accounts (UNK_pyreq2323 / UNK_OutFlareAZ)
  • TL-2026-2477 — CVE-2025-37947: Out-of-Bounds Write in Linux ksmbd Kernel SMB Server Enables Local Privilege Escalation
  • TL-2026-2479 — CVE-2026-20817: Windows Error Reporting Service (WerSvc.dll) Local Privilege Escalation via ALPC Argument Injection
  • TL-2026-2480 — CVE-2025-59201: Windows Network Connection Status Indicator (NCSI) Elevation of Privilege via Registry Symbolic Link Abuse

Theme of the day

Routine activity — no dominant theme emerged.

  • privilege-escalation
  • local-privilege-escalation
  • siemens
  • remote-code-execution
  • social-engineering

Threats published

17 threat lines in the 2026-09-13 debrief, most severe first; entries marked (update) revise an earlier report. Each links to its full profile.

Techniques observed

179 MITRE ATT&CK and ATLAS techniques appear across the day’s reports.

Threat actors

6 named threat actors across the reports.

Nation-state attribution

  • Russia
  • North Korea (DPRK)
  • China

Threat categories

  • VULNERABILITY
  • PHISHING
  • CLOUD
  • RANSOMWARE
  • MALWARE
  • THREAT_INTEL
  • SUPPLY_CHAIN

Severity breakdown

  • critical7
  • high9
  • medium1
  • low0

Indicator & detection coverage

Counts only: the indicator values and detection rule text behind them are tiered.

398 indicators of compromise · Red and above. Compare plans
  • network 123
  • file 97
  • infrastructure 42
  • entity 39
  • package 27
  • behavioral 24
  • tool 23
  • malware 21
  • credential 1
  • technique 1
153 new detection rules (100% of the day’s threats covered) · Blue and above. Compare plans