No exploitation reportedFix available

CVE-2023-33013

No exploitation reported by the sources we read.

Published2023-08-14
WeaknessCWE-78

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

A post-authentication command injection vulnerability in the NTP feature of Zyxel NBG6604 firmware version V1.01(ABIR.1)C0 could allow an authenticated attacker to execute some OS commands remotely by sending a crafted HTTP request.

Timeline

dates in UTC

2023-08-1417:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2023-33013?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-33013?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP

Zyxel nbg6604 firmwareversion to verify

Branch	Affected	Fixed in	Source
1.1	= 1.01\(abir.1\)c0	no fix published	NVD
1.1	= v1.01(abIr.1)c0	no fix published	CISA-ADP

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

Fix

Advisories and patches

www.zyxel.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-10-09
OpenCVESSVC decisionnone—
CNACVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-78read 2026-10-23
NVDweakness (CWE)CWE-78read 2026-10-23
FIRST EPSSEPSS score1.7 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2023-08-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-33013?

Is CVE-2023-33013 actively exploited?

Active exploitation of CVE-2023-33013 has not been confirmed. Its EPSS score was 1.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-33013?

CVE-2023-33013 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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