diff --git a/src/core/radio/trel_interface.cpp b/src/core/radio/trel_interface.cpp
index a1d3ee6b9..7fa190767 100644
--- a/src/core/radio/trel_interface.cpp
+++ b/src/core/radio/trel_interface.cpp
@@ -262,6 +262,15 @@ Error Interface::ParsePeerInfoTxtData(const Peer::Info       &aInfo,
 
     while ((error = iterator.GetNextEntry(entry)) == kErrorNone)
     {
+        // If the TXT data happens to have entries with key longer
+        // than `kMaxKeyLength`, `mKey` would be `nullptr` and full
+        // entry would be placed in `mValue`. We skip over such
+        // entries.
+        if (entry.mKey == nullptr)
+        {
+            continue;
+        }
+
         if (strcmp(entry.mKey, kTxtRecordExtAddressKey) == 0)
         {
             VerifyOrExit(!parsedExtAddress, error = kErrorParse);