diff --git a/internal/c2/manager.go b/internal/c2/manager.go
index 349e986b..c6309e77 100644
--- a/internal/c2/manager.go
+++ b/internal/c2/manager.go
@@ -239,13 +239,15 @@ func (m *Manager) StartListener(id string) (*database.C2Listener, error) {
 	}
 	cfg.ApplyDefaults()
 
-	// 通过工厂创建具体实现
+	// 通过工厂创建具体实现。必须使用 rec 的副本：HTTP handler 在返回 JSON 前会清空
+	// rec.ImplantToken / EncryptionKey 做脱敏，若 listener 实现持有同一指针会导致 beacon 鉴权永久失败。
+	listenerRec := *rec
 	factory := m.registry.Get(rec.Type)
 	if factory == nil {
 		return nil, ErrUnsupportedType
 	}
 	inst, err := factory(ListenerCreationCtx{
-		Listener: rec,
+		Listener: &listenerRec,
 		Config:   cfg,
 		Manager:  m,
 		Logger:   m.logger.With(zap.String("listener_id", rec.ID), zap.String("type", rec.Type)),
diff --git a/internal/c2/manager_start_test.go b/internal/c2/manager_start_test.go
new file mode 100644
index 00000000..9bf15a36
--- /dev/null
+++ b/internal/c2/manager_start_test.go
@@ -0,0 +1,74 @@
+package c2
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"cyberstrike-ai/internal/database"
+
+	"go.uber.org/zap"
+)
+
+// 回归：StartListener 返回的 rec 被 handler 脱敏清空 ImplantToken 后，运行中的 HTTP listener 仍能鉴权。
+func TestStartListener_ImplantTokenSurvivesHandlerRedaction(t *testing.T) {
+	tmp := t.TempDir()
+	db, err := database.NewDB(filepath.Join(tmp, "c2.sqlite"), zap.NewNop())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = db.Close() })
+
+	lnPick, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	port := lnPick.Addr().(*net.TCPAddr).Port
+	_ = lnPick.Close()
+
+	mgr := NewManager(db, zap.NewNop(), tmp)
+	mgr.Registry().Register(string(ListenerTypeHTTPBeacon), NewHTTPBeaconListener)
+	rec, err := mgr.CreateListener(CreateListenerInput{
+		Name:     "t",
+		Type:     string(ListenerTypeHTTPBeacon),
+		BindHost: "127.0.0.1",
+		BindPort: port,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	token := rec.ImplantToken
+
+	rec, err = mgr.StartListener(rec.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// 模拟 internal/handler/c2.go StartListener 在 JSON 响应前的脱敏
+	rec.ImplantToken = ""
+	rec.EncryptionKey = ""
+
+	time.Sleep(50 * time.Millisecond)
+
+	body := `{"hostname":"n","username":"u","os":"Linux","arch":"amd64","internal_ip":"10.0.0.1","pid":42}`
+	req, _ := http.NewRequest(http.MethodPost, "http://127.0.0.1:"+strconv.Itoa(port)+"/check_in", strings.NewReader(body))
+	req.Header.Set("X-Implant-Token", token)
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer resp.Body.Close()
+	b, _ := io.ReadAll(resp.Body)
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("status=%d body=%s", resp.StatusCode, b)
+	}
+	if !strings.Contains(string(b), "session_id") {
+		t.Fatalf("expected session_id in body: %s", b)
+	}
+	_ = mgr.StopListener(rec.ID)
+}