How severe is CVE-2020-27996?

CVE-2020-27996 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27996 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27996?

CVE-2020-27996 affects Smartstore Smartstorenet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27996?

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-2020-27996 published?

CVE-2020-27996 was published on 2020-10-29 and last updated on 2026-06-17.

CVE-2020-27996

CVE-2020-27996 is a high-severity vulnerability in Smartstore Smartstorenet with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Smartstore Smartstorenet
Published: 2020-10-29
Last modified: 2026-06-17

Description

An issue was discovered in SmartStoreNET before 4.0.1. It does not properly consider the need for a CustomModelPartAttribute decoration in certain ModelBase.CustomProperties situations.

Frequently asked questions

What is CVE-2020-27996?: An issue was discovered in SmartStoreNET before 4.0.1. It does not properly consider the need for a CustomModelPartAttribute decoration in certain ModelBase.CustomProperties situations.
How severe is CVE-2020-27996?: CVE-2020-27996 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27996 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27996?: CVE-2020-27996 affects Smartstore Smartstorenet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27996?: 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-2020-27996 published?: CVE-2020-27996 was published on 2020-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:smartstore:smartstorenet:*:*:*:*:*:*:*:*

More vulnerabilities in Smartstore Smartstorenet

CVE-2020-36364 — Critical (CVSS 9.1): An issue was discovered in Smartstore (aka SmartStoreNET) before 4.1.0. Administration/Controllers/ImportController.cs…
CVE-2020-27997 — High (CVSS 8.8): An issue was discovered in SmartStoreNET before 4.1.0. Lack of Cross Site Request Forgery (CSRF) protection may lead to…
CVE-2020-36365 — Medium (CVSS 6.1): Smartstore (aka SmartStoreNET) before 4.1.0 allows CommonController.ClearCache, ClearDatabaseCache, RestartApplication,…

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