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High severity · published Nov 30, 2022
CVE-2021-4242
A vulnerability was found in Sapido BR270n, BRC76n, GR297 and RB1732 and classified as critical
8.8
CVSS
3.1%
EPSS
No
On KEV
Description
A vulnerability was found in Sapido BR270n, BRC76n, GR297 and RB1732 and classified as critical. Affected by this issue is some unknown functionality of the file ip/syscmd.htm. The manipulation leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214592.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BF
Br270n Firmware · Sapido
2.1.03 · source: NVD
BF
Brc76n Firmware · Sapido
2.1.03 · source: NVD
GF
Gr297n Firmware · Sapido
2.1.3 · source: NVD
RF
Rb-1732 Firmware · Sapido
2.0.43 · source: NVD
Affected product
BF
Br270n Firmware
Sapido
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4242
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4242
Exploit
https://blog.csdn.net/qq_44159028/article/details/114590267
Exploit
https://github.com/smallpiggy/Sapido--rce/blob/main/Sapido%E8%B7%AF%E7%94%B1%E5%99%A8-rce.py
Third Party Advisory
https://vuldb.com/?id.214592