diff --git a/lib/connection-request.ts b/lib/connection-request.ts
index 228285a..686243c 100644
--- a/lib/connection-request.ts
+++ b/lib/connection-request.ts
@@ -169,9 +169,13 @@ export async function httpConnectionRequest(
     if (res.statusCode === 503) return "Device is offline";
 
     if (res.statusCode === 401 && res.headers["www-authenticate"]) {
-      authHeader = auth.parseWwwAuthenticateHeader(
-        res.headers["www-authenticate"]
-      );
+      try {
+        authHeader = auth.parseWwwAuthenticateHeader(
+          res.headers["www-authenticate"]
+        );
+      } catch (err) {
+        return "Connection request error: Error parsing www-authenticate header";
+      }
       [username, password, authExp] = await extractAuth(authExp, false);
     } else {
       return `Connection request error: Unexpected status code ${res.statusCode}`;
diff --git a/lib/cwmp.ts b/lib/cwmp.ts
index 355ea36..4776687 100644
--- a/lib/cwmp.ts
+++ b/lib/cwmp.ts
@@ -84,9 +84,13 @@ async function authenticate(
   let authentication;
 
   if (sessionContext.httpRequest.headers["authorization"]) {
-    authentication = auth.parseAuthorizationHeader(
-      sessionContext.httpRequest.headers["authorization"]
-    );
+    try {
+      authentication = auth.parseAuthorizationHeader(
+        sessionContext.httpRequest.headers["authorization"]
+      );
+    } catch (err) {
+      return false;
+    }
   }
 
   if (authentication && authentication.method === "Digest") {