Critical vulnerabilities in Wget

GNU Wget has fixed two vulnerabilities that may allow an attacker to execute arbitrary commands in the target system.

GNU Wget is a common Unix utility to retrieve remote files. Wget contains two vulnerabilities, a stack overflow and a heap overflow, in the handling of HTTP chunked encoding. By convincing a user to download a specific link over HTTP, an attacker may be able to execute arbitrary code with the privileges of the user.

Vulnerability coordination

The vulnerabilities were found by Antti Levomäki, Christian Jalio, and Joonas Pihlaja from Forcepoint. NCSC-FI would like to thank Forcepoint, the GNU Wget project and members of the distros list for participating in the coordination.

  • Servers and server applications
  • Workstations and end-user applications
  • Network devices
  • Mobile communications systems
  • Embedded systems
  • Others


  • Servers and server applications
  • Workstations and end-user applications
Further information +

Attack vector

  • Remote
Further information on the access vector +


  • Execution of arbitrary commands
Further information on the impact +


  • Software update patch
Further information on the remediation +

Vulnerable software:

  • GNU Wget prior to version 1.19.2

Possible solutions and restrictive measures:

Update the vulnerable components according to vendor instructions.

Contact Information

NCSC-FI Vulnerability Coorination can be contacted as follows:
Please quote the advisory reference [FICORA #1010111] in the subject line.

+358 295 390 230
Monday - Friday 08:00 – 16:15 (EET: UTC+2)

Vulnerability Coordination
P.O. Box 313
FI-00181 Helsinki

NCSC-FI encourages those who wish to communicate via email to make use of our PGP key. The key is available at

Further information:

Update history

Key words: Information security , Internet , CERT , NCSC-FI , Vulnerability coordination , Vulnerabilities

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The Finnish Communications Regulatory Authority (FICORA)

The National Cyber Security Centre Finland (NCSC-FI)

Itämerenkatu 3 A

P.O. Box 313


Media contacts by telephone +358 295 390 248