CVE-2021-45420
Published: 14 February 2022
Summary
CVE-2021-45420 is a critical-severity Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) vulnerability in Emerson Dixell Xweb-500 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-32191
Vulnerability details
Emerson Dixell XWEB-500 products are affected by arbitrary file write vulnerability in /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi. An attacker will be able to write any file on the target system without any kind of authentication mechanism, and this can lead to…
more
denial of service and potentially remote code execution. Note: the product has not been supported since 2018 and should be removed or replaced
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Inventory identifies all systems holding or processing data, enabling detection of unauthorized exposure paths before exploitation.
Requires authentication gates on critical functions that must remain unavailable to anonymous public users.
Controls whether organization resources are exposed to external system spheres by permitting or prohibiting their use.
By enforcing authorization matching prior to sharing, the control reduces the risk of exposing sensitive information to unauthorized actors.
Review and removal of nonpublic information from publicly accessible systems directly prevents exposure of sensitive data to unauthorized actors.
Data mining protection mechanisms detect and block unauthorized bulk extraction of sensitive data, directly mitigating exposure to unauthorized actors.
Session auditing enables detection of unauthorized exposure or access to sensitive information during user activities.
Documenting information locations and authorized users enables better protection against unauthorized exposure of sensitive data.