CVE-2021-36741

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.050 · 92 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

4.95% (92nd) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2021-11-03remediate by 2021-11-17

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Trend Micro Multiple Products Improper Input Validation Vulnerability

An improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG, and Worry-Free Business Security 10.0 SP1 allows a remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-434USprimaryCWE-434US

affected products (9)

Products and version ranges known to be affected.

Trend Micro Trend Micro Apex One≤ 2019, SaaSenisa_euvdEU
Trend Micro Trend Micro OfficeScan≤ XG SP1enisa_euvdEU
Trend Micro Trend Micro Worry-Free Business Security≤ 10.0 SP1enisa_euvdEU
Trend Micro Apex One≤ On Premise (2019)fstec_bduRU
Trend Micro Worry-Free Business Security≤ 10.0 SP1 Patch 2329fstec_bduRU
trendmicro apex one= 2019nvdUScpe:2.3:a:trendmicro:apex_one:*:*:*:*:*:*:*:*
trendmicro officescan= xgnvdUScpe:2.3:a:trendmicro:officescan:*:*:*:*:*:*:*:*
trendmicro officescan business security= 10.0nvdUScpe:2.3:a:trendmicro:officescan_business_security:*:*:*:*:*:*:*:*
trendmicro worry-free business security= 10.0nvdUScpe:2.3:a:trendmicro:worry-free_business_security:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-07-29modified 2026-06-17

related (5,029)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-56291US	critical9.8OT critical	14.9% (97th)	KEV	2026-07-09
Joomla Extension - balbooa.com - Unauthenticated file upload in Balbooa Forms extension < 2.4.1 - The Joomla extension Balbooa Forms is vulnerable to an unauthenticated arbitrary f…
CVE-2026-56290US	critical9.8OT critical	30.9% (98th)	KEV	2026-06-29
Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitra…
CVE-2026-48939US	critical9.8OT critical	20.1% (97th)	KEV	2026-06-20
A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
CVE-2026-48908US	critical9.8OT critical	88.5% (100th)	KEV	2026-06-20
A vulnerability in SP Page Builder for Joomla allows unauthenticated users to upload arbitrary files, ultimately resulting in the upload and execution of PHP code.
CVE-2025-52691US	—OT critical	85.7% (100th)	KEV	2025-12-29
Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code…

+5024 more

references (16)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan