Risk Letters

Exploited vulnerability

CVE-2021-20038

TLP:CLEAR

SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability

SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.

Facts

  • Vendor: SonicWall
  • Product: SMA 100 Appliances
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 99.9 %
  • On CISA's Known Exploited Vulnerabilities list since: 28 January 2022
  • First known exploitation: 28 January 2022
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 11 February 2022
  • Weakness: CWE-121
  • First seen by Risk Letters: 28 January 2022

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