How severe is CVE-2021-45420?

CVE-2021-45420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-45420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45420?

CVE-2021-45420 affects Emerson Dixell Xweb-500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45420?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-45420 published?

CVE-2021-45420 was published on 2022-02-14 and last updated on 2026-07-09.

CVE-2021-45420

CVE-2021-45420 is a critical-severity vulnerability in Emerson Dixell Xweb-500 Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Emerson Dixell Xweb-500 Firmware
Published: 2022-02-14
Last modified: 2026-07-09

Description

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 denial of service and potentially remote code execution. Note: the product has not been supported since 2018 and should be removed or replaced.

Frequently asked questions

What is CVE-2021-45420?: 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 denial of service and potentially remote code execution. Note: the product has not been supported since 2018 and should be removed or replaced.
How severe is CVE-2021-45420?: CVE-2021-45420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-45420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45420?: CVE-2021-45420 affects Emerson Dixell Xweb-500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-45420 published?: CVE-2021-45420 was published on 2022-02-14 and last updated on 2026-07-09.

References

https://www.swascan.com/emerson

Affected products (1)

cpe:2.3:o:emerson:dixell_xweb-500_firmware:-:*:*:*:*:*:*:*

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