diff --git a/frontend/src/components/user/profile/TotpDisableDialog.vue b/frontend/src/components/user/profile/TotpDisableDialog.vue
index 97bf2a63dd..d46d83d6ce 100644
--- a/frontend/src/components/user/profile/TotpDisableDialog.vue
+++ b/frontend/src/components/user/profile/TotpDisableDialog.vue
@@ -101,6 +101,7 @@ const methodLoading = ref(true)
 const verificationMethod = ref<'email' | 'password'>('password')
 const loading = ref(false)
 const sendingCode = ref(false)
+let disposed = false
 const codeCooldown = ref(0)
 const cooldownTimer = ref<ReturnType<typeof setInterval> | null>(null)
 const form = ref({
@@ -132,6 +133,7 @@ const handleSendCode = async () => {
   sendingCode.value = true
   try {
     await totpAPI.sendVerifyCode()
+    if (disposed) return
     appStore.showSuccess(t('profile.totp.codeSent'))
     // Start cooldown
     codeCooldown.value = 60
@@ -180,6 +182,7 @@ onMounted(() => {
 })
 
 onUnmounted(() => {
+  disposed = true
   if (cooldownTimer.value) {
     clearInterval(cooldownTimer.value)
     cooldownTimer.value = null
diff --git a/frontend/src/components/user/profile/TotpSetupModal.vue b/frontend/src/components/user/profile/TotpSetupModal.vue
index 0bd4d5e51c..05217cad84 100644
--- a/frontend/src/components/user/profile/TotpSetupModal.vue
+++ b/frontend/src/components/user/profile/TotpSetupModal.vue
@@ -190,6 +190,7 @@ const methodLoading = ref(true)
 const verificationMethod = ref<'email' | 'password'>('password')
 const verifyForm = ref({ emailCode: '', password: '' })
 const sendingCode = ref(false)
+let disposed = false
 const codeCooldown = ref(0)
 const cooldownTimer = ref<ReturnType<typeof setInterval> | null>(null)
 
@@ -328,6 +329,7 @@ const handleSendCode = async () => {
   sendingCode.value = true
   try {
     await totpAPI.sendVerifyCode()
+    if (disposed) return
     appStore.showSuccess(t('profile.totp.codeSent'))
     // Start cooldown
     codeCooldown.value = 60
@@ -397,6 +399,7 @@ onMounted(() => {
 })
 
 onUnmounted(() => {
+  disposed = true
   if (cooldownTimer.value) {
     clearInterval(cooldownTimer.value)
     cooldownTimer.value = null
diff --git a/frontend/src/components/user/profile/__tests__/totp-timer-cleanup.spec.ts b/frontend/src/components/user/profile/__tests__/totp-timer-cleanup.spec.ts
index 44d9fcf9b9..b4b2170097 100644
--- a/frontend/src/components/user/profile/__tests__/totp-timer-cleanup.spec.ts
+++ b/frontend/src/components/user/profile/__tests__/totp-timer-cleanup.spec.ts
@@ -79,6 +79,18 @@ describe('TOTP 弹窗定时器清理', () => {
     clearIntervalSpy.mockRestore()
   })
 
+  it.each([TotpSetupModal, TotpDisableDialog])('does not start a cooldown after unmounting during send', async (component) => {
+    let resolve!: (value: unknown) => void
+    mocks.sendVerifyCode.mockReturnValueOnce(new Promise(res => { resolve = res }))
+    const wrapper = mount(component)
+    await flushPromises()
+    await wrapper.findAll('button').find(b => b.text().includes('profile.totp.sendCode'))!.trigger('click')
+    wrapper.unmount()
+    resolve({ success: true }); await flushPromises()
+    expect(setIntervalSpy).not.toHaveBeenCalled()
+    expect(mocks.showSuccess).not.toHaveBeenCalled()
+  })
+
   it('TotpSetupModal 卸载时清理倒计时定时器', async () => {
     const wrapper = mount(TotpSetupModal)
     await flushPromises()