7.2

CVE-2023-27988: zyxel nas326_firmware OS Command Injection

CVSS: 7.2v3.1HighModified
Published 30-05-2023Last modified 14-01-2025
Open JSON

Vulnerability summary

CVE-2023-27988 is a high (CVSS 7.2) OS Command Injection vulnerability in zyxel nas326_firmware. EPSS estimates a 1.36% chance of exploitation in the next 30 days, higher than 71.3% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.2/10
010
High · v3.1 (CVE.org)
EPSS score
1.36%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-05-2023
    PublishedVulnerability first disclosed.
  2. 14-01-2025
    Last modifiedVulnerability information updated.

Description

The post-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.13)C0 could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device remotely.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.36%

Chance of exploitation in the next 30 days

Percentile

71%

Versus all other CVEs

30-day change

-0.05 pp

From 1.42% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.36%

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

Zyxel4 products

1 vendor · 4 products

References

1 links