diff --git a/cyclonedx/model/vulnerability.py b/cyclonedx/model/vulnerability.py
index 5f3bf024..1c4e55e9 100644
--- a/cyclonedx/model/vulnerability.py
+++ b/cyclonedx/model/vulnerability.py
@@ -59,6 +59,11 @@
 )
 from .tool import Tool, ToolRepository, _ToolRepositoryHelper
 
+_VSS_VECTOR_RE_CVSS_V4 = re.compile(r'^CVSS:4\.\d/?')
+_VSS_VECTOR_RE_CVSS_V3 = re.compile(r'^CVSS:3\.\d/?')
+_VSS_VECTOR_RE_CVSS_V2 = re.compile(r'^CVSS:2\.\d/?')
+_VSS_VECTOR_RE_OWASP = re.compile(r'^OWASP/?')
+
 
 @serializable.serializable_class(ignore_unknown_during_deserialization=True)
 class BomTargetVersionRange:
@@ -643,15 +648,15 @@ def get_localised_vector(self, vector: str) -> str:
             The vector without any scheme prefix as a `str`.
         """
         if self is VulnerabilityScoreSource.CVSS_V4 and vector.startswith('CVSS:4.'):
-            return re.sub(r'^CVSS:4\.\d/?', '', vector)
+            return _VSS_VECTOR_RE_CVSS_V4.sub('', vector)
         if (
             self in (VulnerabilityScoreSource.CVSS_V3_1, VulnerabilityScoreSource.CVSS_V3)
         ) and vector.startswith('CVSS:3.'):
-            return re.sub(r'^CVSS:3\.\d/?', '', vector)
+            return _VSS_VECTOR_RE_CVSS_V3.sub('', vector)
         if self is VulnerabilityScoreSource.CVSS_V2 and vector.startswith('CVSS:2.'):
-            return re.sub(r'^CVSS:2\.\d/?', '', vector)
+            return _VSS_VECTOR_RE_CVSS_V2.sub('', vector)
         if self is VulnerabilityScoreSource.OWASP and vector.startswith('OWASP'):
-            return re.sub(r'^OWASP/?', '', vector)
+            return _VSS_VECTOR_RE_OWASP.sub('', vector)
         return vector
 
     def get_value_pre_1_4(self) -> str: