CVE-2023-22922: zyxel nbg-418n_firmware Classic Buffer Overflow
CVSS: 7.5v3.1HighModified
Published 01-05-2023Last modified 30-01-2025
Vulnerability summary
CVE-2023-22922 is a high (CVSS 7.5) Classic Buffer Overflow vulnerability in zyxel nbg-418n_firmware. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.93%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 01-05-2023PublishedVulnerability first disclosed.
- 30-01-2025Last modifiedVulnerability information updated.
Description
A buffer overflow vulnerability in the Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.14)C0 could allow a remote unauthenticated attacker to cause DoS conditions by sending crafted packets if Telnet is enabled on a vulnerable device.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.93%
Chance of exploitation in the next 30 days
Percentile
60%
Versus all other CVEs
30-day change
0.00 pp
From 0.93% on 21-09-2026
21-09-202621-10-2026
EPSS score0.93%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Zyxel2 products
- nbg-418n_firmware≤ 1.00\(aarp.13\)c0
- nbg-418n v2 firmware< V1.00(AARP.14)C0
1 vendor · 2 products