CVE-2026-6952 — A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device

Back Back to CVE browser

HIGH

A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device

Published Jul 21, 2026

7.2

HIGH

CVSS 3.1

EPSS 1.52%

Description

A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

Affected products

Vendor Zyxel Product AX7501-B1 firmware Default
unaffected
- Version
  <= 5.17(ABPC.7.2)C0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Zyxel

AX7501-B1 firmware

unaffected

Version	Status	Constraints
<= 5.17(ABPC.7.2)C0	affected	-

Remediation

No remediation recorded yet.

Metrics

1.52% 0.01521

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.01521

Score over time

Jul–Oct 2026

EPSS v5

Percentile over time

EPSS v5

Table of values (2 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	1.52% (0.01521)	73.71th	v5 (v2026.06.15)
Jul 21, 2026	0.95% (0.00950)	57.37th	v5 (v2026.06.15)

Weaknesses (1)

CWE-78

OS Command Injection

References (1)

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-vulnerability-in-certain-dsl-ethernet-cpe-fiber-onts-and-wireless-extenders-07-21-2026
vendor-advisory

Link	Providers	Tags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-vulnerability-in-certain-dsl-ethernet-cpe-fiber-onts-and-wireless-extenders-07-21-2026		vendor-advisory