How severe is CVE-2020-8603?

CVE-2020-8603 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-8603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8603?

CVE-2020-8603 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-8603 published?

CVE-2020-8603 was published on 2020-05-27 and last updated on 2026-06-17.

CVE-2020-8603

CVE-2020-8603 is a medium-severity vulnerability in Trendmicro Interscan Web Security Virtual Appliance with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Trendmicro Interscan Web Security Virtual Appliance
Published: 2020-05-27
Last modified: 2026-06-17

Description

A cross-site scripting vulnerability (XSS) in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow a remote attacker to tamper with the web interface of affected installations. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

Frequently asked questions

What is CVE-2020-8603?: A cross-site scripting vulnerability (XSS) in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow a remote attacker to tamper with the web interface of affected installations. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
How severe is CVE-2020-8603?: CVE-2020-8603 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-8603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8603?: CVE-2020-8603 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8603 published?: CVE-2020-8603 was published on 2020-05-27 and last updated on 2026-06-17.

References

Affected products (1)

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

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