Critical severity · published Dec 22, 2021
CVE-2021-21877
Specially-crafted HTTP requests can lead to arbitrary command execution in “GET” requests
9.1
CVSS
2.8%
EPSS
No
On KEV
Description
Specially-crafted HTTP requests can lead to arbitrary command execution in “GET” requests. An attacker can make authenticated HTTP requests to trigger this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
P2
Premierwave 2050 Firmware · Lantronix
8.9.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21877
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21877
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1315
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