CVE Intelligence
CISA KEV High Injection

CVE-2020-8468 — Trend Micro Multiple Products Content Validation Escape Vulnerability

Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.

Published Mar 17, 2020 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, GitHub Security Advisories, CVE Program (cve.org) e CISA ADP · CNA: trendmicro

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Nov 3, 2021 ☠ Tonto Team
How the score was calculated
  • Confirmed exploitation (CISA KEV)+35
  • Exploited by 1 threat actor(s) (MITRE ATT&CK)+10
  • EPSS 6.2% (30-day exploitation probability)+14
  • Technical severity (high)+6
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Confirmed
CISA KEV, listed Nov 3, 2021
EPSS FIRST
6.17%
ahead of 93% of scored CVEs · Oct 14, 2026
Affects
Trend Micro, Inc.
Apex One and 3 more
CVSS base
8.8
High · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Active
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: May 3, 2022 — passed 1626 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Trend Micro, Inc. Apex One, Trend Micro, Inc. Officescan, Trend Micro, Inc. Trend Micro OfficeScan, Trend Micro Apex One, Trend Micro Worry-Free Business Security (WFBS)…).
  2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
  3. Apply the fixed version or the patch documented under Remediation.
  4. EPSS ahead of 93% of scored CVEs: prioritize it in the patch queue.
  5. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Trend Micro, Inc. Apex One version 2019 Vulnerable NIST National Vulnerability Database
Trend Micro, Inc. Officescan version xgversion xg-sp1 Vulnerable NIST National Vulnerability Database
Trend Micro, Inc. Trend Micro OfficeScan, Trend Micro Apex One, Trend Micro Worry-Free Business Security (WFBS) version OfficeScan XG (12.0), Apex One 2019 (14.0), WFBS 9.0, 9.5 and 10.0 Vulnerable CVE Program (cve.org) e CISA ADP
Trend Micro, Inc. Worry-free Business Security version 9.0-sp3version 9.5version 10.0version 10.0-sp1 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
8.8 CVSS 3.1 High 2.8 5.9 nvd@nist.gov via NIST National Vulnerability Database
8.8 CVSS 3.1 High 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
8.8 CVSS 3.1 High — — GitHub, Inc. via GitHub Security Advisories
8.8 CVSS 3.1 High — — CISA-ADP via CVE Program (cve.org) e CISA ADP
6.5 CVSS 2.0 Medium 8.0 6.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-74 · Injection

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed
Nov 3, 2021
Federal deadline
May 3, 2022
passed 1626 day(s) ago
Ransomware use
Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Threat actors exploiting this CVE MITRE ATT&CK

According to MITRE ATT&CK.

Tonto Team G0131

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 6.17%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
  • Hunt retroactively in logs from before Nov 3, 2021 (KEV listing): exploitation may have started earlier.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · trend micro/trend micro officescan, trend micro apex one, trend micro worry-free business security (wfbs)
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • Affected products added · trendmicro/apex one, trendmicro/officescan, trendmicro/worry-free business security
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 8.8
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Added to CISA KEV (detected)
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • Record created in this database
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • 2021
  • Added to CISA KEV catalog
    Nov 2, 2021 · CISA
  • 2020
  • CVE published
    Mar 17, 2020 · trendmicro

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

7 on the record

Elsewhere on this site

Trend Micro, Inc.
every CVE for this vendor
2021-11
what else CISA listed that month
Injection
same class
CWE-74
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-45208 TOCTOU Race Condition in Trend Micro, Inc. Apex One May 21, 2026
  • CVE-2026-45207 An origin validation vulnerability in the Apex One/SEP agent could allow a local… May 21, 2026
  • CVE-2026-45206 An origin validation vulnerability in the Apex One/SEP agent could allow a local… May 21, 2026
  • CVE-2026-34928 An origin validation vulnerability in the Apex One/SEP agent could allow a local… May 21, 2026
  • CVE-2026-34927 An origin validation vulnerability in the Apex One/SEP agent could allow a local… May 21, 2026
  • CVE-2026-34926 Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability KEV May 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-8468 is "Trend Micro Multiple Products Content Validation Escape Vulnerability", rated High. It affects Apex One (Trend Micro, Inc.); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 8.8 describes technical severity. EPSS 6.17% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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