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Fencer Vulns
high 7.5

CVE-2023-28770 in the critical feed json

The sensitive information exposure vulnerability in the CGI “Export_Log” and the binary “zcmd” in Zyxel DX5401-B0 firmware versions prior t…

published 2023-04-27 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32405

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
57.8%
EPSS 57.8% chance of exploitation in 30 days, percentile 99%
public exploits
1
Metasploit

Summary

The sensitive information exposure vulnerability in the CGI “Export_Log” and the binary “zcmd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to read the system files and to retrieve the password of the supervisor from the encrypted file.

Patch / fix

  • zyxel dx5401-b0_firmware 5.17\(abyo.1\)c0

Timeline

  1. First public exploit (Metasploit exploit/linux/http/zyxel_lfi_unauth_ssh_rce)
  2. Published

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

57.78% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Zyxel DX5401-B0 firmware

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-203 Observable Discrepancy

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.