How severe is CVE-2021-36356?

CVE-2021-36356 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-2021-36356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36356?

CVE-2021-36356 affects Kramerav Viaware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36356?

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-2021-36356 published?

CVE-2021-36356 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-36356

CVE-2021-36356 is a critical-severity vulnerability in Kramerav Viaware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 54% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 54% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Kramerav Viaware
Published: 2021-08-31
Last modified: 2026-06-17

Description

KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI). NOTE: this issue exists because of an incomplete fix for CVE-2019-17124.

Frequently asked questions

What is CVE-2021-36356?: KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI). NOTE: this issue exists because of an incomplete fix for CVE-2019-17124.
How severe is CVE-2021-36356?: CVE-2021-36356 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-2021-36356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36356?: CVE-2021-36356 affects Kramerav Viaware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36356?: 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-2021-36356 published?: CVE-2021-36356 was published on 2021-08-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kramerav:viaware:*:*:*:*:*:*:*:*

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