CVE-2020-8599
Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability - [Actively Exploited]
Description
Trend Micro Apex One (2019) and OfficeScan XG server contain a vulnerable EXE file that could allow a remote attacker to write arbitrary data to an arbitrary path on affected installations and bypass ROOT login. Authentication is not required to exploit this vulnerability.
INFO
Published Date :
March 18, 2020, 1:15 a.m.
Last Modified :
Oct. 31, 2025, 2:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Trend Micro Apex One and OfficeScan server contain a vulnerable EXE file that could allow a remote attacker to write data to a path on affected installations and bypass root login.
Apply updates per vendor instructions.
https://nvd.nist.gov/vuln/detail/CVE-2020-8599
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade to the relevant fixed version referenced in Trend Micro advisory 000245571.
Public PoC/Exploit Available at Github
CVE-2020-8599 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-8599.
| URL | Resource |
|---|---|
| https://success.trendmicro.com/jp/solution/000244253 | Patch Vendor Advisory Broken Link |
| https://success.trendmicro.com/solution/000245571 | Patch Vendor Advisory Broken Link |
| https://success.trendmicro.com/jp/solution/000244253 | Patch Vendor Advisory Broken Link |
| https://success.trendmicro.com/solution/000245571 | Patch Vendor Advisory Broken Link |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 | US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-8599 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-8599
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cisa-kev vulnerability 0day cisa exploits
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-8599 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-8599 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Oct. 31, 2025
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:trendmicro:officescan:xg:*:*:*:*:*:*:* *cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:* *cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:* OR *cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:* *cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:* *cpe:2.3:a:trendmicro:officescan:xg:-:*:*:*:*:*:* Changed Reference Type Trend Micro, Inc.: https://success.trendmicro.com/jp/solution/000244253 Types: Patch, Vendor Advisory Trend Micro, Inc.: https://success.trendmicro.com/jp/solution/000244253 Types: Broken Link, Patch, Vendor Advisory Changed Reference Type Trend Micro, Inc.: https://success.trendmicro.com/solution/000245571 Types: Patch, Vendor Advisory Trend Micro, Inc.: https://success.trendmicro.com/solution/000245571 Types: Broken Link, Patch, Vendor Advisory Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 Types: US Government Resource Changed Reference Type CVE: https://success.trendmicro.com/solution/000245571 Types: Patch, Vendor Advisory CVE: https://success.trendmicro.com/solution/000245571 Types: Broken Link, Patch, Vendor Advisory Changed Reference Type CVE: https://success.trendmicro.com/jp/solution/000244253 Types: Patch, Vendor Advisory CVE: https://success.trendmicro.com/jp/solution/000244253 Types: Broken Link, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 22, 2025
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 21, 2025
Action Type Old Value New Value Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 21, 2025
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 -
Modified Analysis by [email protected]
Feb. 12, 2025
Action Type Old Value New Value -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 06, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://success.trendmicro.com/jp/solution/000244253 Added Reference https://success.trendmicro.com/solution/000245571 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE CWE-434 NVD-CWE-noinfo -
Initial Analysis by [email protected]
Mar. 19, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://success.trendmicro.com/jp/solution/000244253 No Types Assigned https://success.trendmicro.com/jp/solution/000244253 Patch, Vendor Advisory Changed Reference Type https://success.trendmicro.com/solution/000245571 No Types Assigned https://success.trendmicro.com/solution/000245571 Patch, Vendor Advisory Added CWE NIST CWE-434 Added CPE Configuration OR *cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:* *cpe:2.3:a:trendmicro:officescan:xg:*:*:*:*:*:*:* *cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 9.8
Base CVSS Score: 10
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
67.94 }} 1.04%
score
0.98503
percentile