Authentication bypass in FortiWAN
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-26102 |
| CWE-ID | CWE-287 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
FortiWAN Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Improper Authentication
EUVDB-ID: #VU52680
Risk: High
CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-26102
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in the authentication process. A remote non-authenticated attacker can send a specially crafted HTTP POST request and delete arbitrary files on the system using directory traversal sequences. In particular, deleting specific configuration files will reset the Admin password to its default value.
Successful exploitation of the vulnerability may allow an attacker to gain full access to the affected system.
Install updates from vendor's website.
Vulnerable software versionsFortiWAN: before 5.1.1
External linkshttp://fortiguard.com/psirt/FG-IR-21-048
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
