Medium severity · published May 26, 2026
CVE-2026-4795
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware…
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GF
GS1200-10v3 firmware · Zyxel
<= 1.00(ACPW.2)C0 · source: vendor
GF
GS1200-5HPv3 firmware · Zyxel
<= 1.00(ACPU.2)C0 · source: vendor
GF
GS1200-5v3 firmware · Zyxel
<= 1.00(ACPS.2)C0 · source: vendor
GF
GS1200-8HPv3 firmware · Zyxel
<= 1.00(ACPV.2)C0 · source: vendor
GF
GS1200-8v3 firmware · Zyxel
<= 1.00(ACPT.2)C0 · source: vendor