diff --git a/libs/common/src/vault/models/domain/cipher.spec.ts b/libs/common/src/vault/models/domain/cipher.spec.ts
index c4e1832ae38..f97ef8b31ac 100644
--- a/libs/common/src/vault/models/domain/cipher.spec.ts
+++ b/libs/common/src/vault/models/domain/cipher.spec.ts
@@ -770,6 +770,9 @@ describe("Cipher DTO", () => {
 
   describe("toSdkCipher", () => {
     it("should map to SDK Cipher", () => {
+      const lastUsedDate = new Date("2025-04-15T12:00:00.000Z").getTime();
+      const lastLaunched = new Date("2025-04-15T12:00:00.000Z").getTime();
+
       const cipherData: CipherData = {
         id: "id",
         organizationId: "orgId",
@@ -838,7 +841,7 @@ describe("Cipher DTO", () => {
         ],
       };
 
-      const cipher = new Cipher(cipherData);
+      const cipher = new Cipher(cipherData, { lastUsedDate, lastLaunched });
       const sdkCipher = cipher.toSdkCipher();
 
       expect(sdkCipher).toEqual({
@@ -875,7 +878,10 @@ describe("Cipher DTO", () => {
         edit: true,
         permissions: new CipherPermissionsApi(),
         viewPassword: true,
-        localData: undefined,
+        localData: {
+          lastUsedDate: "2025-04-15T12:00:00.000Z",
+          lastLaunched: "2025-04-15T12:00:00.000Z",
+        },
         attachments: [
           {
             id: "a1",
diff --git a/libs/common/src/vault/models/domain/cipher.ts b/libs/common/src/vault/models/domain/cipher.ts
index 5db8809f3f5..ef05bdadfe1 100644
--- a/libs/common/src/vault/models/domain/cipher.ts
+++ b/libs/common/src/vault/models/domain/cipher.ts
@@ -358,7 +358,14 @@ export class Cipher extends Domain implements Decryptable<CipherView> {
       permissions: this.permissions,
       viewPassword: this.viewPassword,
       localData: this.localData
-        ? { lastUsedDate: this.localData.lastUsedDate, lastLaunched: this.localData.lastLaunched }
+        ? {
+            lastUsedDate: this.localData.lastUsedDate
+              ? new Date(this.localData.lastUsedDate).toISOString()
+              : undefined,
+            lastLaunched: this.localData.lastLaunched
+              ? new Date(this.localData.lastLaunched).toISOString()
+              : undefined,
+          }
         : undefined,
       attachments: this.attachments?.map((a) => a.toSdkAttachment()),
       fields: this.fields?.map((f) => f.toSdkField()),
diff --git a/libs/common/src/vault/models/view/cipher.view.ts b/libs/common/src/vault/models/view/cipher.view.ts
index dc447551bff..b57a4274122 100644
--- a/libs/common/src/vault/models/view/cipher.view.ts
+++ b/libs/common/src/vault/models/view/cipher.view.ts
@@ -245,7 +245,16 @@ export class CipherView implements View, InitializerMetadata {
     cipherView.permissions = CipherPermissionsApi.fromSdkCipherPermissions(obj.permissions);
     cipherView.edit = obj.edit;
     cipherView.viewPassword = obj.viewPassword;
-    cipherView.localData = obj.localData;
+    cipherView.localData = obj.localData
+      ? {
+          lastUsedDate: obj.localData.lastUsedDate
+            ? new Date(obj.localData.lastUsedDate).getTime()
+            : undefined,
+          lastLaunched: obj.localData.lastLaunched
+            ? new Date(obj.localData.lastLaunched).getTime()
+            : undefined,
+        }
+      : undefined;
     cipherView.attachments = obj.attachments?.map((a) => AttachmentView.fromSdkAttachmentView(a));
     cipherView.fields = obj.fields?.map((f) => FieldView.fromSdkFieldView(f));
     cipherView.passwordHistory = obj.passwordHistory?.map((ph) =>
diff --git a/libs/common/src/vault/services/default-cipher-encryption.service.ts b/libs/common/src/vault/services/default-cipher-encryption.service.ts
index 34f9ea27344..ce937bc8bbc 100644
--- a/libs/common/src/vault/services/default-cipher-encryption.service.ts
+++ b/libs/common/src/vault/services/default-cipher-encryption.service.ts
@@ -30,7 +30,7 @@ export class DefaultCipherEncryptionService implements CipherEncryptionService {
 
           using ref = sdk.take();
           const sdkCipherView = ref.value.vault().ciphers().decrypt(cipher.toSdkCipher());
-          // The SDK returns a cipherView or throws an error if decryption fails.
+
           const clientCipherView = CipherView.fromSdkCipherView(sdkCipherView)!;
 
           // Decrypt Fido2 credentials if available