9.8

CVE-2023-22920: zyxel lte3202-m437_firmware Improper Access Control

CVSS: 9.8v3.1CriticalModified
Published 21-02-2023Last modified 12-03-2025
Open JSON

Vulnerability summary

CVE-2023-22920 is a critical (CVSS 9.8) Improper Access Control vulnerability in zyxel lte3202-m437_firmware. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.84%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-02-2023
    PublishedVulnerability first disclosed.
  2. 12-03-2025
    Last modifiedVulnerability information updated.

Description

A security misconfiguration vulnerability exists in the Zyxel LTE3316-M604 firmware version V2.00(ABMP.6)C0 due to a factory default misconfiguration intended for testing purposes. A remote attacker could leverage this vulnerability to access an affected device using Telnet.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.84%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

0.00 pp

From 0.84% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.84%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Zyxel2 products

1 vendor · 2 products

References

1 links