Login Request a demo
Medium severity · published Feb 24, 2026
CVE-2025-11845
A null pointer dereference vulnerability in the certificate downloader CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0…
4.9
CVSS
0.9%
EPSS
No
On KEV
Description
A null pointer dereference vulnerability in the certificate downloader CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VF
VMG3625-T50B firmware · Zyxel
<= 5.50(ABPM.9.6)C0 · source: vendor, NVD
WF
WX3100-T0 firmware · Zyxel
<= 5.50(ABVL.4.8)C0 · source: vendor, NVD
AF
Ax7501-b1 Firmware · Zyxel
before 5.17\(abpc.7.1\)c0 · source: NVD
DF
Dx3300-t0 Firmware · Zyxel
before 5.50\(abvy.7.1\)c0 · source: NVD
DF
Dx3300-t1 Firmware · Zyxel
before 5.50\(abvy.7.1\)c0 · source: NVD
DF
Dx3301-t0 Firmware · Zyxel
before 5.50\(abvy.7.1\)c0 · source: NVD
DF
Dx4510-b0 Firmware · Zyxel
before 5.17\(abyl.10.1\)c0 · source: NVD
DF
Dx4510-b1 Firmware · Zyxel
before 5.17\(abyl.10.1\)c0 · source: NVD
DF
Dx5401-b1 Firmware · Zyxel
before 5.17\(abyo.7.1\)c0 · source: NVD
EF
Ee3301-00 Firmware · Zyxel
before 5.63\(acmu.2.1\)c0 · source: NVD
EF
Ee5301-00 Firmware · Zyxel
before 5.63\(acld.2.1\)c0 · source: NVD
EF
Ee6510-10 Firmware · Zyxel
before 5.19\(acjq.4.1\)c0 · source: NVD
Affected product
VF
VMG3625-T50B firmware
Zyxel
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11845
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11845
Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026
More from VMG3625-T50B firmware
9.8
CVE-2025-7673
A buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could allow an unauthenticated attacker…
8.8
CVE-2025-13943
A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an…
8.8
CVE-2025-8693
A post-authentication command injection vulnerability in the "priv" parameter of Zyxel DX3300-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an authenticated…
8.0
CVE-2022-26413
A command injection vulnerability in the CGI program of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0 could allow a local authenticated attacker to execute arbitrary OS…
7.5
CVE-2025-6599
An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform…