Critical severity · published Jun 3, 2022
CVE-2021-42887
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm
9.8
CVSS
44.3%
EPSS
No
On KEV
Description
In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)44.3% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EF
Ex1200t Firmware · Totolink
4.1.2cu.5215 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42887
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42887
Exploit
https://github.com/p1Kk/vuln/blob/main/totolink_ex1200t_login_bypass.md
More from Ex1200t Firmware
9.8
CVE-2025-51451
In TOTOLINK EX1200T firmware 4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm
9.8
CVE-2025-5600
A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713
9.8
CVE-2025-28039
TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the setUpgradeFW function through the FileName parameter
9.8
CVE-2025-28038
TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command execution vulnerability in the setWebWlanIdx function through the webWlanIdx parameter
9.8
CVE-2023-52032
TOTOlink EX1200T V4.1.2cu.5232_B20210713 was discovered to contain a remote command execution (RCE) vulnerability via the "main" function
