Critical severity9.8NVD Advisory· Published Sep 2, 2020· Updated Jun 17, 2026
CVE-2020-24355
CVE-2020-24355
Description
Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by insecure permissions which allows regular and other users to create new users with elevated privileges. This is done by changing "FirstIndex" field in JSON that is POST-ed during account creation. Similar may also be possible with account deletion.
Affected products
3- cpe:2.3:o:zyxel:vmg5313-b30b_firmware:*:*:*:*:*:*:*:*Range: <=5.13\(abcj.6\)b3_1127
- Zyxel/VMG5313-B30Bdescription
- Range: 5.13(ABCJ.6)b3_1127
Patches
Vulnerability mechanics
References
3- blog.somegeneric.ninja/Zyxel_VMG5153_B30BnvdExploitThird Party Advisory
- blog.somegeneric.ninja/Zyxel_VMG5153_B30B_part2nvdExploitThird Party Advisory
- www.zyxel.com/support/security_advisories.shtmlnvdVendor Advisory
News mentions
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