CVE-2026-9152
CWE-306Published: May 21, 2026· Updated: May 21, 2026
Official Description
A missing authentication vulnerability exists in the Altium 365 SearchService. A legacy SOAP endpoint exposes search index operations without requiring authentication, session tokens, or any form of identity verification. An unauthenticated network attacker who can reference a target workspace's identifier can interact with that workspace's search index, crossing tenant boundaries.
Successful exploitation allows reading a workspace's indexed contents (such as component data, project and folder names, and user metadata) and injecting, modifying, or deleting search index entries. These operations affect the search index only, not the underlying vault data, but they can disclose sensitive workspace information and compromise the integrity and availability of search results. Altium 365 cloud deployments are affected; on-premise Altium Enterprise Server is not affected.
Risk Analysis
This critical vulnerability in Altium 365 SearchService is due to a missing authentication check on a legacy SOAP endpoint. An unauthenticated network attacker can interact with a target workspace's search index, potentially reading indexed contents and injecting, modifying, or deleting entries. With a CVSSv4 score of 10.0, this flaw represents an extreme risk, leading to disclosure of sensitive information and compromise of search result integrity and availability.
No public exploit is currently known for this vulnerability. The flaw is remotely exploitable by an unauthenticated attacker over the network with low attack complexity.
Organizations using Altium 365 should apply any available patches or configuration changes to secure the SearchService. Implement strict network segmentation and access controls to limit exposure of the Altium 365 instance.
Technical Analysis
CVE-2026-9152 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (1)
Quick Facts
Related CVEs (CWE-306)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-9152 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts