Patch now. It under exploitation confirmed by CISA and has a working public exploit.
ssvc Actcvss 7.5epss 84%
from disclosure to weapon0 days
Published on NVDApr 17
metasploitApr 8
CISA KEV+2534d
exploitation probability
84%top 1% of all CVEs
observed exploitation
yesCISA + VulnCheck
1 public exploit(s)
Action required by CISAfederal deadline: 2022-04-15
Apply updates per vendor instructions.
In short
TP-LINK routers with vulnerable firmware allow attackers to read any file on the device by using special path commands (../) in web requests. This exposes sensitive information like configuration files and user data stored on the router.
Technical detail
Directory traversal vulnerability in multiple TP-LINK router models (Archer C5/C7/C8/C9, TL-WDR and TL-WR series) allowing unauthenticated remote attackers to access arbitrary files via path traversal sequences (../) in the PATH_INFO parameter to the login/ endpoint. Exploitation requires no authentication and directly impacts confidentiality of stored data on the device.
Summary generated and translated by AI from the official description.
Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317, C7 (2.0) with firmware before 150304, and C8 (1.0) with firmware before 150316, Archer C9 (1.0), TL-WDR3500 (1.0), TL-WDR3600 (1.0), and TL-WDR4300 (1.0) with firmware before 150302, TL-WR740N (5.0) and TL-WR741ND (5.0) with firmware before 150312, and TL-WR841N (9.0), TL-WR841N (10.0), TL-WR841ND (9.0), and TL-WR841ND (10.0) with firmware before 150310 allows remote attackers to read arbitrary files via a .. (dot dot) in the PATH_INFO to login/.