A vulnerability in Trend Micro InterScan Web Security Virtual Appliance 6.5 SP2 could allow an attacker to manipulate system updates using…

published 2020-12-17 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29331

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.7%; EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

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.

Exploit prediction

2.69% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

sec-consult.com https://sec-consult.com/vulnerability-lab/advisory/multiple-critical-vulnerabilities-in-trend-micro-interscan-web-security-virtual-appliance/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Trend Micro Trend Micro InterScan Web Security Virtual Appliance

Classification

Weakness

CWE-287 Improper Authentication
CWE-352 Cross-Site Request Forgery

References

sec-consult.com /vulnerability-lab/advisory/multiple-critical-vulnerabilities-in-trend-micro-interscan-web-security-virtual-ap
exploit, third-party-advisory
success.trendmicro.com /solution/000283077
vendor-advisory

Sources

CVE List CVE-2020-8465
NVD CVE-2020-8465

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary