How severe is CVE-2021-26601?

CVE-2021-26601 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-26601 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26601?

CVE-2021-26601 affects Impresscms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26601?

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

When was CVE-2021-26601 published?

CVE-2021-26601 was published on 2022-03-28 and last updated on 2026-06-17.

CVE-2021-26601

CVE-2021-26601 is a high-severity vulnerability in Impresscms with a CVSS 3.x base score of 8.1. 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: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Impresscms
Published: 2022-03-28
Last modified: 2026-06-17

Description

ImpressCMS before 1.4.3 allows libraries/image-editor/image-edit.php image_temp Directory Traversal.

Frequently asked questions

What is CVE-2021-26601?: ImpressCMS before 1.4.3 allows libraries/image-editor/image-edit.php image_temp Directory Traversal.
How severe is CVE-2021-26601?: CVE-2021-26601 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-26601 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26601?: CVE-2021-26601 affects Impresscms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26601?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-26601 published?: CVE-2021-26601 was published on 2022-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:impresscms:impresscms:*:*:*:*:*:*:*:*

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