T1203 · ATT&CK technique
Exploitation for Client Execution
42 actors on record using it
Out of date: the sync last ran 5 hours ago. Newer CVEs and scores may be missing from the map.
Every mark is an actor ATT&CK records using this technique. Red ones also exploit a CVE in CISA KEV.
Open T1203 on attack.mitre.orgAdversaries may exploit software vulnerabilities in client applications to execute code. Vulnerabilities can exist in software due to unsecure coding practices that can lead to unanticipated behavior. Adversaries can take advantage of certain vulnerabilities through targeted exploitation for the purpose of arbitrary code execution. Oftentimes the most valuable exploits to an offensive toolkit are those that can be used to obtain code execution on a remote system because they can be used to gain access to that system. Users will expect to see files related to the applications they commonly use…
Source: MITRE ATT&CK, T1203. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.
Every one of the 42 is a mark on the map. Named now: 1 to 26, most on record first.
- APT28
- APT41
- APT29
- Lazarus Group
- Sandworm
- OilRig
- Mustang Panda
- Threat Group-3390
- OceanLotus
- MuddyWater
- Berserk Bear
- Leviathan
- BRONZE BUTLER
- UNC3886
- Patchwork
- Ember Bear
- APT3
- APT33
- APT37
- Cloud Atlas
- Tropic Trooper
- ShinyHunters
- Cobalt Group
- Higaisa
- SideWinder
- Tonto Team
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-14. CVE List through 2026-11-14 · EPSS of 2026-11-13 · CISA KEV checked 2026-11-14. Sources: MITRE ATT&CK (© The MITRE Corporation, reproduced and distributed with its permission), the MISP Galaxy (CC0), and CyberSIXT's own coverage.