CVE-2021-31520

high

Description

A weak session token authentication bypass vulnerability in Trend Micro IM Security 1.6 and 1.6.5 could allow an remote attacker to guess currently logged-in administrators' session session token in order to gain access to the product's web management interface.

References

https://www.zerodayinitiative.com/advisories/ZDI-21-525/

https://success.trendmicro.com/solution/000286439

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-18420

Details

Source: Mitre, NVD

Published: 2021-05-10

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.03901