diff --git a/infrastructure/abri/abri_client.py b/infrastructure/abri/abri_client.py
index bdf246b8e..ab59a6fb2 100644
--- a/infrastructure/abri/abri_client.py
+++ b/infrastructure/abri/abri_client.py
@@ -254,7 +254,11 @@ class AbriClient:
             mobile=numbers.mobile,
             telephone=numbers.telephone,
             secondary_number=numbers.secondary,
-            vulnerabilities=(),
+            vulnerabilities=tuple(
+                text
+                for vulnerability in element.findall("Vulnerability")
+                if (text := (vulnerability.text or "").strip())
+            ),
         )
 
     @staticmethod
diff --git a/orchestration/tenant_data_sync_orchestrator.py b/orchestration/tenant_data_sync_orchestrator.py
index c5a5ad557..6edff7156 100644
--- a/orchestration/tenant_data_sync_orchestrator.py
+++ b/orchestration/tenant_data_sync_orchestrator.py
@@ -6,6 +6,22 @@ from etl.hubspot.deal_contacts_client import HubspotDealContactsClient
 from infrastructure.abri.abri_client import AbriClient
 
 
+def _vulnerability_description(tenant: Tenant) -> Optional[str]:
+    """The tenant's distinct vulnerabilities, verbatim and newline-joined.
+
+    Case-insensitively distinct within the tenant, keeping the first-seen
+    casing and document order.
+    """
+    distinct: List[str] = []
+    seen: set[str] = set()
+    for vulnerability in tenant.vulnerabilities:
+        if vulnerability.lower() in seen:
+            continue
+        seen.add(vulnerability.lower())
+        distinct.append(vulnerability)
+    return "\n".join(distinct) if distinct else None
+
+
 def _contact_properties(tenant: Tenant) -> Dict[str, str]:
     candidates: Dict[str, Optional[str]] = {
         "firstname": tenant.forenames,
@@ -13,6 +29,7 @@ def _contact_properties(tenant: Tenant) -> Dict[str, str]:
         "mobilephone": tenant.mobile,
         "phone": tenant.telephone,
         "secondary_phone_number": tenant.secondary_number,
+        "vulnerability_description": _vulnerability_description(tenant),
     }
     properties = {name: value for name, value in candidates.items() if value}
     # Always written, so "not vulnerable" is distinguishable from "not synced".