High severity7.5NVD Advisory· Published Apr 24, 2023· Updated Jun 17, 2026
CVE-2023-22915
CVE-2023-22915
Description
A buffer overflow vulnerability in the “fbwifi_forward.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.30 through 5.35, USG20(W)-VPN firmware versions 4.30 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote unauthenticated attacker to cause DoS conditions by sending a crafted HTTP request if the Facebook WiFi function were enabled on an affected device.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
20- Range: 4.30 through 5.35
- cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*Range: >=4.50,<=5.35
- cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*Range: >=4.50,<=5.35
- cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*Range: >=4.50,<=5.35
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*range: >=4.30,<=5.35
- (no CPE)range: 4.30 - 5.35
- cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*Range: >=4.50,<=5.35
- cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*Range: >=4.50,<=5.35
- Range: 4.50 - 5.35
- Range: 4.30 - 5.35
- Range: 4.30 - 5.35
- Range: 4.50 through 5.35
- Range: 4.30 through 5.35
- Range: 4.30 through 5.35
Patches
Vulnerability mechanics
References
1News mentions
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