CVE-2021-25252

Trend Micro's Virus Scan API (VSAPI) and Advanced Threat Scan Engine (ATSE) - are vulnerable to a memory exhaustion vulnerability that may lead to denial-of-service or system freeze if exploited by an attacker using a specially crafted file.

Published: 2021-03-03 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25252 is rated Low Risk (37/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.56%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-25252

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.18% 0.56% +0.38%
2 2026-02-15 0.06% 0.18% +0.11%
3 2025-03-17 — 0.06% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25252

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2021-25252

Affected software / configurations for CVE-2021-25252

Vendor Product Version Raw CPE
trendmicro apex_central 2019 cpe:2.3:a:trendmicro:apex_central:2019:-:*:*:*:*:*:*
trendmicro apex_one 2019 cpe:2.3:a:trendmicro:apex_one:2019:-:*:*:*:*:*:*
trendmicro cloud_edge 5.0 cpe:2.3:a:trendmicro:cloud_edge:5.0:*:*:*:*:*:*:*
trendmicro apex_one — cpe:2.3:a:trendmicro:apex_one:-:-:*:*:*:*:*:*
trendmicro deep_security 10.0 cpe:2.3:a:trendmicro:deep_security:10.0:-:*:*:*:*:*:*
trendmicro deep_security 11.0 cpe:2.3:a:trendmicro:deep_security:11.0:-:*:*:*:*:*:*
trendmicro deep_security 12.0 cpe:2.3:a:trendmicro:deep_security:12.0:-:*:*:*:*:*:*
trendmicro deep_security 20.0 cpe:2.3:a:trendmicro:deep_security:20.0:-:*:*:long_term_support:*:*:*
trendmicro control_manager 7.0 cpe:2.3:a:trendmicro:control_manager:7.0:-:*:*:*:*:*:*
trendmicro deep_discovery_analyzer 5.1 cpe:2.3:a:trendmicro:deep_discovery_analyzer:5.1:-:*:*:*:*:*:*
trendmicro deep_discovery_email_inspector 2.5 cpe:2.3:a:trendmicro:deep_discovery_email_inspector:2.5:-:*:*:*:*:*:*
trendmicro deep_discovery_inspector 3.8 cpe:2.3:a:trendmicro:deep_discovery_inspector:3.8:-:*:*:*:*:*:*
trendmicro interscan_messaging_security_virtual_appliance 9.1 cpe:2.3:a:trendmicro:interscan_messaging_security_virtual_appliance:9.1:-:*:*:*:*:*:*
trendmicro interscan_web_security_virtual_appliance 6.5 cpe:2.3:a:trendmicro:interscan_web_security_virtual_appliance:6.5:-:*:*:*:*:*:*
trendmicro officescan — cpe:2.3:a:trendmicro:officescan:-:*:*:*:*:*:*:*
trendmicro portal_protect 2.6 cpe:2.3:a:trendmicro:portal_protect:2.6:*:*:*:*:*:*:*
trendmicro scanmail 14.0 cpe:2.3:a:trendmicro:scanmail:14.0:*:*:*:*:microsoft_exchange:*:*
trendmicro scanmail_for_ibm_domino 5.8 cpe:2.3:a:trendmicro:scanmail_for_ibm_domino:5.8:-:*:*:*:*:*:*
trendmicro serverprotect_for_storage 6.0 cpe:2.3:a:trendmicro:serverprotect_for_storage:6.0:-:*:*:*:*:*:*
trendmicro serverprotect 5.8 cpe:2.3:a:trendmicro:serverprotect:5.8:-:*:*:*:*:*:*
trendmicro serverprotect_for_network_appliance_filers 5.8 cpe:2.3:a:trendmicro:serverprotect_for_network_appliance_filers:5.8:-:*:*:*:*:*:*
trendmicro safe_lock 1.1 cpe:2.3:a:trendmicro:safe_lock:1.1:-:*:*:txone:*:*:*
trendmicro worry-free_business_security 10.1 cpe:2.3:a:trendmicro:worry-free_business_security:10.1:-:*:*:*:*:*:*

References for CVE-2021-25252

URL Tags
https://success.trendmicro.com/solution/000285675 Patch Vendor Advisory
cvelogic Threat Intelligence