PatchTheCVECVE-2021-25252: Trend Micro's Virus Scan API (VSAPI) and Advanced Threat Scan Engine (ATSE) - are vulnerable to a memory exhau
32
Routine
MEDIUM 5.5DOWNGRADEDOWNGRADEDOWNGRADE
CVE-2021-25252 is a medium-severity flaw (CVSS 5.5) affecting apex central, apex one, cloud edge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 50%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2021-03-03 |
| Last modified | 2026-06-17 |
Publisher (CNA): Trend Micro, Inc. · Vendor: trendmicro
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
trendmicro apex central DOWNGRADE
Affected: 2019
Fixed in: no fixed release known
Safe to downgrade to: a release before 2019
1. Check installed version
apt-cache policy apex-central || rpm -q apex-central || apex-central --version
2. No fixed release: DOWNGRADE to a release before 2019 (Debian / Ubuntu)
apt-cache madison apex-central
sudo apt install apex-central=<VERSION_BEFORE_2019>
sudo apt-mark hold apex-central
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list apex-central
sudo dnf downgrade apex-central-<VERSION_BEFORE_2019>
sudo dnf versionlock add apex-central
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
trendmicro apex one DOWNGRADE
Affected: 2019 · all versions
Fixed in: no fixed release known
Safe to downgrade to: a release before 2019
1. Check installed version
apt-cache policy apex-one || rpm -q apex-one || apex-one --version
2. No fixed release: DOWNGRADE to a release before 2019 (Debian / Ubuntu)
apt-cache madison apex-one
sudo apt install apex-one=<VERSION_BEFORE_2019>
sudo apt-mark hold apex-one
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list apex-one
sudo dnf downgrade apex-one-<VERSION_BEFORE_2019>
sudo dnf versionlock add apex-one
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
trendmicro cloud edge DOWNGRADE
Affected: 5.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.0
1. Check installed version
apt-cache policy cloud-edge || rpm -q cloud-edge || cloud-edge --version
2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)
apt-cache madison cloud-edge
sudo apt install cloud-edge=<VERSION_BEFORE_5.0>
sudo apt-mark hold cloud-edge
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list cloud-edge
sudo dnf downgrade cloud-edge-<VERSION_BEFORE_5.0>
sudo dnf versionlock add cloud-edge
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
trendmicro deep security DOWNGRADE
Affected: 10.0 · 11.0 · 12.0 · 20.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 10.0
1. Check installed version
apt-cache policy deep-security || rpm -q deep-security || deep-security --version
2. No fixed release: DOWNGRADE to a release before 10.0 (Debian / Ubuntu)
apt-cache madison deep-security
sudo apt install deep-security=<VERSION_BEFORE_10.0>
sudo apt-mark hold deep-security
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list deep-security
sudo dnf downgrade deep-security-<VERSION_BEFORE_10.0>
sudo dnf versionlock add deep-security
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
trendmicro control manager DOWNGRADE
Affected: 7.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0
1. Check installed version
apt-cache policy control-manager || rpm -q control-manager || control-manager --version
2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)
apt-cache madison control-manager
sudo apt install control-manager=<VERSION_BEFORE_7.0>
sudo apt-mark hold control-manager
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list control-manager
sudo dnf downgrade control-manager-<VERSION_BEFORE_7.0>
sudo dnf versionlock add control-manager
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
trendmicro deep discovery analyzer DOWNGRADE
Affected: 5.1
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.1
1. Check installed version
apt-cache policy deep-discovery-analyzer || rpm -q deep-discovery-analyzer || deep-discovery-analyzer --version
2. No fixed release: DOWNGRADE to a release before 5.1 (Debian / Ubuntu)
apt-cache madison deep-discovery-analyzer
sudo apt install deep-discovery-analyzer=<VERSION_BEFORE_5.1>
sudo apt-mark hold deep-discovery-analyzer
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list deep-discovery-analyzer
sudo dnf downgrade deep-discovery-analyzer-<VERSION_BEFORE_5.1>
sudo dnf versionlock add deep-discovery-analyzer
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-25252?
apex central: downgrade or apply the listed mitigation; apex one: downgrade or apply the listed mitigation; cloud edge: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-25252 being exploited?
CVE-2021-25252 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-25252 affect?
CVE-2021-25252 affects apex central, apex one, cloud edge. Severity is medium (CVSS 5.5). 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
How urgent is CVE-2021-25252?
Priority 32/100. No elevated risk signals yet.
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