How severe is CVE-2021-20651?

CVE-2021-20651 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-20651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20651?

CVE-2021-20651 affects Elecom File Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20651?

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-2021-20651 published?

CVE-2021-20651 was published on 2021-02-12 and last updated on 2026-06-17.

CVE-2021-20651

CVE-2021-20651 is a critical-severity vulnerability in Elecom File Manager with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Elecom File Manager
Published: 2021-02-12
Last modified: 2026-06-17

Description

Directory traversal vulnerability in ELECOM File Manager all versions allows remote attackers to create an arbitrary file or overwrite an existing file in a directory which can be accessed with the application privileges via unspecified vectors.

Frequently asked questions

What is CVE-2021-20651?: Directory traversal vulnerability in ELECOM File Manager all versions allows remote attackers to create an arbitrary file or overwrite an existing file in a directory which can be accessed with the application privileges via unspecified vectors.
How severe is CVE-2021-20651?: CVE-2021-20651 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-20651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20651?: CVE-2021-20651 affects Elecom File Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20651?: 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-2021-20651 published?: CVE-2021-20651 was published on 2021-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:elecom:file_manager:*:*:*:*:*:*:*:*

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