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CVE-2021-45420 affects Emerson Dixell XWEB-500 products. The vulnerability is an arbitrary file write issue in the CGI endpoints /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi. Based on the provided information, a remote attacker can write arbitrary files to the target system without any authentication. This unsafe handling of file write operations can allow an attacker to place attacker-controlled files in arbitrary locations on the device, resulting in service disruption and potentially enabling remote code execution depending on what files can be overwritten or introduced and how the system processes them.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.