diff --git a/CHANGELOG.md b/CHANGELOG.md
index a00972ea..2bed4e22 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,16 @@
+# Version 1.5.1 Release Notes
+
+Hotfix release addressing a safety-critical E-Stop bypass.
+
+### Bug Fixes
+
+- **E-Stop** - Fixed shocker commands being transmitted while E-Stop was active. Commands are now rejected at the entry point (`CommandHandler::HandleCommand`) and discarded in the RF transmit task's receive loop when E-Stop is engaged.
+
+**Full Changelog: [1.5.0 -> 1.5.1](https://github.com/OpenShock/Firmware/compare/1.5.0...1.5.1)**
+
+
+
+
 # Version 1.5.0 Release Notes
 
 This release is a major firmware update bringing a fully reworked RF transmitter pipeline for more reliable shocker communication, a new T330 shocker protocol, an RFC 8908-compliant captive portal, a rebuilt frontend (Svelte 5 + shadcn), and significant improvements to E-Stop handling and rate limiting.
diff --git a/frontend/package.json b/frontend/package.json
index e5967eb8..55bbfd2d 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "frontend",
-	"version": "1.5.0",
+	"version": "1.5.1",
 	"private": true,
 	"type": "module",
 	"scripts": {
diff --git a/src/CommandHandler.cpp b/src/CommandHandler.cpp
index d1150c57..21fc0145 100644
--- a/src/CommandHandler.cpp
+++ b/src/CommandHandler.cpp
@@ -293,6 +293,11 @@ gpio_num_t CommandHandler::GetRfTxPin()
 
 bool CommandHandler::HandleCommand(ShockerModelType model, uint16_t shockerId, ShockerCommandType type, uint8_t intensity, uint16_t durationMs)
 {
+  if (EStopManager::IsEStopped()) {
+    OS_LOGD(TAG, "Ignoring shocker command due to EmergencyStop being activated");
+    return false;
+  }
+
   ScopedReadLock lock__rf(&s_rfTransmitterMutex);
 
   if (s_rfTransmitter == nullptr) {
diff --git a/src/radio/RFTransmitter.cpp b/src/radio/RFTransmitter.cpp
index 8456931c..a78408d9 100644
--- a/src/radio/RFTransmitter.cpp
+++ b/src/radio/RFTransmitter.cpp
@@ -219,6 +219,17 @@ void RFTransmitter::TransmitTask()
         return;
       }
 
+      // Discard any command received while estopped
+      if (OpenShock::EStopManager::IsEStopped()) {
+        // Immediately break out to stop sequences; we can empty the queue later
+        if (!wasEstopped) {
+          break;
+        }
+
+        // Discard next item in queue
+        continue;
+      }
+
       if ((cmd.flags & kFlagOverwrite) != 0) {
         // Replace the sequence if it already exists
         if (modifySequence(sequences, cmd.modelType, cmd.shockerId, cmd.type, cmd.intensity, cmd.transmitEnd)) {
@@ -231,6 +242,7 @@ void RFTransmitter::TransmitTask()
       }
     }
 
+    // Terminate all remaining sequences
     bool isEstopped = OpenShock::EStopManager::IsEStopped();
     if (isEstopped != wasEstopped) {
       wasEstopped = isEstopped;