diff --git a/wechat-viewer/config.py b/wechat-viewer/config.py
index 9f45f45..8756275 100644
--- a/wechat-viewer/config.py
+++ b/wechat-viewer/config.py
@@ -3,6 +3,7 @@
 import subprocess
 import json
 import os
+import re
 from pathlib import Path
 
 BASE_DIR = Path(__file__).parent
@@ -68,6 +69,8 @@ def _get_custom_name(account_id):
         pass
     return None
 
+_ACCOUNT_DIR_RE = re.compile(r"^[0-9a-f]{32}$")
+
 def discover_accounts():
     accounts = []
     base = "/data/data/com.tencent.mm/MicroMsg"
@@ -80,9 +83,11 @@ def discover_accounts():
             line = line.strip()
             if not line:
                 continue
+            folder = os.path.basename(line.rstrip("/"))
+            if not _ACCOUNT_DIR_RE.match(folder):
+                continue  # 跳过微信自己的缓存/功能目录（CronetCache/emoji/jscache/...），不是账号
             db_path = os.path.join(line, "EnMicroMsg.db")
             if _su_exists(db_path):
-                folder = os.path.basename(line.rstrip("/"))
                 key = _get_key_for_account(folder)
                 # 名字优先级：自定义名 > 从DB读 > hash前缀
                 name = _get_custom_name(folder) or _get_nickname(db_path, key) or folder[:8]