diff --git a/cve_bin_tool/output_engine/__init__.py b/cve_bin_tool/output_engine/__init__.py
index 5cf0e60b2c..a697785d1f 100644
--- a/cve_bin_tool/output_engine/__init__.py
+++ b/cve_bin_tool/output_engine/__init__.py
@@ -803,7 +803,7 @@ def output_cves(self, outfile, output_type="console"):
                 self.vex_type,
                 self.all_cve_data,
                 self.vex_product_info["revision_reason"],
-                self.vex_product_info["sbom_serial_number"],
+                self.vex_product_info.get("sbom_serial_number", ""),
                 logger=self.logger,
             )
             vexgen.generate_vex()