diff --git a/netutils/nist.py b/netutils/nist.py
index a316280..32f3b5d 100644
--- a/netutils/nist.py
+++ b/netutils/nist.py
@@ -219,7 +219,8 @@ def _os_platform_object_builder(vendor: str, platform: str, version: str) -> obj
     }
 
     if version_parser:
-        field_values.update(version_parser)
+        valid_fields = {field[0] for field in class_fields}
+        field_values.update({key: value for key, value in version_parser.items() if key in valid_fields})
 
     class_name = f"{vendor.capitalize()}{platform.capitalize()}"
     get_nist_urls_func = get_nist_url_funcs.get(vendor, {}).get(platform) or get_nist_url_funcs["default"]
diff --git a/tests/unit/test_nist.py b/tests/unit/test_nist.py
index 2d1c830..187dbed 100644
--- a/tests/unit/test_nist.py
+++ b/tests/unit/test_nist.py
@@ -48,3 +48,19 @@ def test_get_nist_urls_failed():
 def test_get_nist_vendor_platform_urls():
     platform_obj = nist.get_nist_vendor_platform_urls("cisco", "ios", "15.5")
     assert platform_obj == ["https://services.nvd.nist.gov/rest/json/cves/2.0?cpeName=cpe:2.3:o:cisco:ios:15.5:*"]
+
+
+def test_os_platform_object_builder_with_unparseable_version():
+    platform_obj = nist._os_platform_object_builder(
+        "cisco",
+        "ios",
+        "03.03.05SE",
+    )
+
+    assert platform_obj.vendor == "cisco"
+    assert platform_obj.os_type == "ios"
+    assert platform_obj.version_string == "03.03.05SE"
+    assert platform_obj.vendor_metadata is False
+    assert platform_obj.major is None
+    assert platform_obj.minor is None
+    assert platform_obj.patch is None