Risk Letters

Exploited vulnerability

CVE-2016-7255

TLP:CLEAR

Microsoft Win32k Privilege Escalation Vulnerability

Microsoft Win32k kernel-mode driver fails to properly handle objects in memory which allows for privilege escalation. Successful exploitation allows an attacker to run code in kernel mode.

Facts

  • Vendor: Microsoft
  • Product: Win32k
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 81 %
  • On CISA's Known Exploited Vulnerabilities list since: 3 November 2021
  • First known exploitation: 3 November 2021
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 3 May 2022
  • Weakness: CWE-264
  • First seen by Risk Letters: 3 November 2021

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD