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Exploitation reportedNot in CISA KEV yetFix available

CVE-2023-28770

Exploitation reported by one source. First attested on 2023-10-19 by GCVE · shadowserver.

  • Published2023-04-27
  • Fixed in5.17\(abyo.1\)c0
  • WeaknessCWE-200 · CWE-203

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2023-04-2709:15CVE publishedNVD
  2. 2023-10-1912:30Listed as exploited by GCVEGCVE
  3. 2023-10-1912:30Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-28770?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-28770?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Zyxel dx5401-b0 firmwareversion to verify
BranchAffectedFixed in
5.17< 5.17\(abyo.1\)c05.17\(abyo.1\)c0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As Zyxel, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Zyxel DX5401-B0 firmware
    Affected
    • = < V5.17(ABYO.1)C0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-05-10

Fix

  1. Update Zyxel dx5401-b0 firmware to 5.17\(abyo.1\)c0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/http/zyxel_lfi_unauth_ssh_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2023-04-27
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jwcx-m84w-h98g

Frequently asked questions

What is CVE-2023-28770?

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.

Is CVE-2023-28770 actively exploited?

A proof-of-concept exploit exists for CVE-2023-28770, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-28770?

CVE-2023-28770 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record