How severe is CVE-2020-28578?

CVE-2020-28578 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-2020-28578 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 72% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28578?

CVE-2020-28578 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28578?

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-2020-28578 published?

CVE-2020-28578 was published on 2020-11-18 and last updated on 2026-06-17.

CVE-2020-28578

CVE-2020-28578 is a critical-severity vulnerability in Trendmicro Interscan Web Security Virtual Appliance with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 72% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 72% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Trendmicro Interscan Web Security Virtual Appliance
Published: 2020-11-18
Last modified: 2026-06-17

Description

A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an unauthenticated, remote attacker to send a specially crafted HTTP message and achieve remote code execution with elevated privileges.

Frequently asked questions

What is CVE-2020-28578?: A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an unauthenticated, remote attacker to send a specially crafted HTTP message and achieve remote code execution with elevated privileges.
How severe is CVE-2020-28578?: CVE-2020-28578 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-2020-28578 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 72% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28578?: CVE-2020-28578 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28578?: 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-2020-28578 published?: CVE-2020-28578 was published on 2020-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:trendmicro:interscan_web_security_virtual_appliance:6.5:sp2:*:*:*:*:*:*

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