CVE-2023-6764

Summary

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.

Affected Software

VendorProductVersion RangeStatus
ZyxelATP series firmwareversion 4.32 through 5.37 Patch 1affected
ZyxelUSG FLEX series firmwareversion 4.50 through 5.37 Patch 1affected
ZyxelUSG FLEX 50(W) series firmwareversion 4.16 through 5.37 Patch 1affected
ZyxelUSG20(W)-VPN series firmwareversion 4.16 through 5.37 Patch 1affected

Weaknesses

  • CWE-134: CWE-134 Use of Externally-Controlled Format String

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References