How severe is CVE-2020-8465?

CVE-2020-8465 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-2020-8465 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8465?

CVE-2020-8465 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8465?

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-2020-8465 published?

CVE-2020-8465 was published on 2020-12-17 and last updated on 2026-06-17.

CVE-2020-8465

CVE-2020-8465 is a critical-severity vulnerability in Trendmicro Interscan Web Security Virtual Appliance with a CVSS 3.x base score of 9.8. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Trendmicro Interscan Web Security Virtual Appliance
Published: 2020-12-17
Last modified: 2026-06-17

Description

A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an attacker to manipulate system updates using a combination of CSRF bypass (CVE-2020-8461) and authentication bypass (CVE-2020-8464) to execute code as user root.

Frequently asked questions

What is CVE-2020-8465?: A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an attacker to manipulate system updates using a combination of CSRF bypass (CVE-2020-8461) and authentication bypass (CVE-2020-8464) to execute code as user root.
How severe is CVE-2020-8465?: CVE-2020-8465 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-2020-8465 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8465?: CVE-2020-8465 affects Trendmicro Interscan Web Security Virtual Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8465?: 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-2020-8465 published?: CVE-2020-8465 was published on 2020-12-17 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Trendmicro Interscan Web Security Virtual Appliance

CVE-2016-9269 — Critical (CVSS 9.9): Remote Command Execution in com.trend.iwss.gui.servlet.ManagePatches in Trend Micro Interscan Web Security Virtual…
CVE-2020-8466 — Critical (CVSS 9.8): A command injection vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2, with the improved…
CVE-2020-28578 — Critical (CVSS 9.8): A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an unauthenticated, remote…
CVE-2020-8606 — Critical (CVSS 9.8): A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow remote attackers to bypass…
CVE-2020-8461 — High (CVSS 8.8): A CSRF protection bypass vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an…
CVE-2020-28579 — High (CVSS 8.8): A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an authenticated, remote…

All CVEs affecting Trendmicro Interscan Web Security Virtual Appliance →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →