Denial of service in Cisco Meraki MX and Z Series
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2025-20212 |
| CWE-ID | CWE-457 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Meraki MX Hardware solutions / Firmware Meraki MX64 Hardware solutions / Firmware Meraki MX64W Hardware solutions / Firmware Meraki MX65 Hardware solutions / Firmware Meraki MX65W Hardware solutions / Firmware Meraki MX67 Hardware solutions / Firmware Meraki MX67C Hardware solutions / Firmware Meraki MX67W Hardware solutions / Firmware Meraki MX68 Hardware solutions / Firmware Meraki MX68CW Hardware solutions / Firmware Meraki MX68W Hardware solutions / Firmware Meraki MX75 Hardware solutions / Firmware Meraki MX84 Hardware solutions / Firmware Meraki MX85 Hardware solutions / Firmware Meraki MX95 Hardware solutions / Firmware Meraki MX100 Hardware solutions / Firmware Meraki MX105 Hardware solutions / Firmware Meraki MX250 Hardware solutions / Firmware Meraki MX400 Hardware solutions / Firmware Meraki MX450 Hardware solutions / Firmware Meraki MX600 Hardware solutions / Firmware Meraki vMX Hardware solutions / Firmware Meraki Z3 Hardware solutions / Firmware Meraki Z3C Hardware solutions / Firmware Meraki Z4 Hardware solutions / Firmware Meraki Z4C Hardware solutions / Firmware |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Use of Uninitialized Variable
EUVDB-ID: #VU106921
Risk: Medium
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-20212
CWE-ID:
CWE-457 - Use of Uninitialized Variable
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to uninitialized variable in the Cisco AnyConnect VPN server when an SSL VPN session is established. A remote user can cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMeraki MX: 16.2 - 19.1
Meraki MX64: All versions
Meraki MX64W: All versions
Meraki MX65: All versions
Meraki MX65W: All versions
Meraki MX67: All versions
Meraki MX67C: All versions
Meraki MX67W: All versions
Meraki MX68: All versions
Meraki MX68CW: All versions
Meraki MX68W: All versions
Meraki MX75: All versions
Meraki MX84: All versions
Meraki MX85: All versions
Meraki MX95: All versions
Meraki MX100: All versions
Meraki MX105: All versions
Meraki MX250: All versions
Meraki MX400: All versions
Meraki MX450: All versions
Meraki MX600: All versions
Meraki vMX: All versions
Meraki Z3: All versions
Meraki Z3C: All versions
Meraki Z4: All versions
Meraki Z4C: All versions
CPE2.3- cpe:2.3:h:cisco_systems:meraki_mx:16.2:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx:17.0:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx:18.1:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx64:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx64w:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx65:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx65w:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx67:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx67c:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx67w:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx68:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx68cw:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx68w:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx75:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx84:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx85:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx95:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx100:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx105:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx250:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx400:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx450:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_mx600:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_vmx:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_z3:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_z3c:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_z4:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:meraki_z4c:*:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
