Security readout for executives and security teams
Plain-English summary
Trend Micro Apex Central has a critical unauthenticated file-upload flaw. An attacker who can reach the service could upload an arbitrary file that may lead to remote code execution. Because CISA lists CVE-2022-26871 in KEV, relevant exposure should be treated as urgent.
Executive priority
Treat this as an emergency remediation item for any Apex Central environment. The issue is unauthenticated, remotely reachable, potentially enables server takeover, and is listed by CISA as known exploited.
Technical view
CVE-2022-26871 affects Trend Micro Apex Central 2019 on-premise and SaaS. It has CVSS 3.1 score 9.8: network reachable, low complexity, no privileges, and no user interaction. The source bundle maps it to CWE-345 and describes arbitrary upload leading to possible remote code execution.
Likely exposure
Exposure is most likely where Trend Micro Apex Central 2019 instances are reachable by attackers, especially internet-facing or broadly accessible management servers. The bundle also lists SaaS as affected, but does not provide deployment-specific exposure details.
Exploitation context
Active exploitation is supported by CISA KEV listing for CVE-2022-26871. The provided sources do not include exploit mechanics, observed threat actors, or timing details, so avoid assuming more than confirmed exploitation status.
Researcher notes
The bundle confirms product, impact, CVSS vector, CWE, affected line, and KEV status. It does not provide precise fixed versions, indicators of compromise, or exploit details. Validation should stay focused on asset presence, exposure, vendor advisory status, and evidence review.
Mitigation direction
- Follow Trend Micro advisory guidance for CVE-2022-26871 immediately.
- Prioritize any internet-facing Apex Central 2019 deployments.
- Restrict network access to Apex Central management interfaces.
- Review CISA KEV deadlines and internal remediation SLAs.
- If patch status is unclear, contact Trend Micro support.
Validation and detection
- Inventory Apex Central 2019 on-premise and SaaS usage.
- Confirm whether vendor guidance for CVE-2022-26871 has been applied.
- Check external exposure of Apex Central management endpoints.
- Review logs for unexpected uploads or server-side file changes.
- Validate compensating network controls around management access.
Public sources used
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-345: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-26871 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://success.trendmicro.com/solution/000290678CVE reference · x_refsource_MISC
- https://success.trendmicro.com/jp/solution/000290660CVE reference · x_refsource_MISC
- https://www.jpcert.or.jp/english/at/2022/at220008.htmlCVE reference · x_refsource_MISC
- https://jvn.jp/vu/JVNVU99107357CVE reference · x_refsource_MISC
- https://appweb.trendmicro.com/supportNews/NewsDetail.aspx?id=4435CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26871CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Verification of Data Authenticity
Insufficient Verification of Data Authenticity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.