diff --git a/arch/risc-v/src/common/espressif/CMakeLists.txt b/arch/risc-v/src/common/espressif/CMakeLists.txt
index 3f78bdd5c8b..aac5d5c1fbf 100644
--- a/arch/risc-v/src/common/espressif/CMakeLists.txt
+++ b/arch/risc-v/src/common/espressif/CMakeLists.txt
@@ -424,6 +424,22 @@ add_custom_command(
   COMMENT "Generating ESP-compatible binary"
   VERBATIM)
 
+# ##############################################################################
+# Flash operation Usage: ESPTOOL_PORT=/dev/ttyUSBx cmake --build <build_dir>
+# --target flash
+# ##############################################################################
+
+add_custom_target(
+  flash
+  DEPENDS nuttx_post_build
+  COMMAND
+    ${CMAKE_COMMAND} -DBINARY_DIR=${CMAKE_BINARY_DIR}
+    -DSOURCE_DIR=${CMAKE_SOURCE_DIR} -DNUTTX_DIR=${NUTTX_DIR} -P
+    ${NUTTX_DIR}/tools/espressif/espressif_flash.cmake
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+  COMMENT "Flashing firmware via esptool to $ENV{ESPTOOL_PORT}"
+  VERBATIM)
+
 # ##############################################################################
 # ULP Support (TODO)
 # ##############################################################################
diff --git a/tools/espressif/espressif_flash.cmake b/tools/espressif/espressif_flash.cmake
new file mode 100644
index 00000000000..cc9305a4492
--- /dev/null
+++ b/tools/espressif/espressif_flash.cmake
@@ -0,0 +1,199 @@
+# ##############################################################################
+# tools/espressif/espressif_flash.cmake
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+#
+# Flash NuttX images via esptool.py (CMake equivalent of
+# tools/espressif/Config.mk FLASH target).
+#
+# Typical use (RISC-V Espressif boards built with CMake):
+#
+# export ESPTOOL_PORT=/dev/ttyUSB0   # or set for a single command cmake --build
+# <builddir> -t flash
+#
+# The ``flash`` target is defined in
+# arch/risc-v/src/common/espressif/CMakeLists.txt. It runs this file via cmake
+# -P with BINARY_DIR, SOURCE_DIR, and NUTTX_DIR set; the serial port must be set
+# in the ESPTOOL_PORT environment variable (unset or empty is a fatal error
+# unless you pass a non-empty -DESPTOOL_PORT to cmake -P).
+#
+# Standalone / scripting:
+#
+# ESPTOOL_PORT=/dev/ttyUSB0 cmake -P
+# <NUTTX>/tools/espressif/espressif_flash.cmake \ -DBINARY_DIR=<builddir>
+# -DSOURCE_DIR=<cmake-source-dir> \ -DNUTTX_DIR=<nuttx-tree>
+#
+# A non-empty -DESPTOOL_PORT on cmake -P skips the environment requirement.
+#
+# If -DNUTTX_DIR is omitted, it defaults to SOURCE_DIR. mcuboot-<chip>.bin is
+# read from NUTTX_DIR.
+#
+# Optional -D variables: ESPTOOL_BAUD     Serial baud (default: 921600, same as
+# Config.mk)
+#
+# Required for this script: BINARY_DIR, SOURCE_DIR, and a serial port via
+# non-empty ESPTOOL_PORT in the environment or non-empty -DESPTOOL_PORT for
+# cmake -P.
+#
+# ##############################################################################
+
+cmake_minimum_required(VERSION 3.16)
+
+if(NOT DEFINED BINARY_DIR)
+  message(FATAL_ERROR "BINARY_DIR not defined")
+endif()
+
+if(NOT DEFINED SOURCE_DIR)
+  message(FATAL_ERROR "SOURCE_DIR not defined")
+endif()
+
+if(NOT DEFINED NUTTX_DIR)
+  set(NUTTX_DIR "${SOURCE_DIR}")
+endif()
+
+if((NOT DEFINED ESPTOOL_PORT) OR ("${ESPTOOL_PORT}" STREQUAL ""))
+  if("$ENV{ESPTOOL_PORT}" STREQUAL "")
+    message(
+      FATAL_ERROR
+        "FLASH error: ESPTOOL_PORT environment variable is not set.\n"
+        "Example: ESPTOOL_PORT=/dev/ttyUSB0 cmake --build <builddir> -t flash\n"
+        "Or with cmake -P: pass a non-empty -DESPTOOL_PORT=... (and -DBINARY_DIR=... "
+        "-DSOURCE_DIR=... [ -DESPTOOL_BAUD=... ] [ -DNUTTX_DIR=... ])")
+  endif()
+  set(ESPTOOL_PORT "$ENV{ESPTOOL_PORT}")
+endif()
+
+find_program(ESPTOOL esptool esptool.py)
+find_program(PYTHON3 python3)
+
+if(NOT ESPTOOL)
+  message(FATAL_ERROR "esptool / esptool.py not found in PATH")
+endif()
+
+if(NOT DEFINED ESPTOOL_BAUD)
+  set(ESPTOOL_BAUD 921600)
+endif()
+
+include(${SOURCE_DIR}/cmake/nuttx_kconfig.cmake)
+
+set(DOTCONFIG "${BINARY_DIR}/.config")
+if(NOT EXISTS ${DOTCONFIG})
+  message(FATAL_ERROR ".config not found at ${DOTCONFIG}")
+endif()
+
+nuttx_export_kconfig(${DOTCONFIG})
+
+include(${SOURCE_DIR}/tools/espressif/espressif_esptool_common.cmake)
+
+if(CONFIG_ESPRESSIF_FLASH_DETECT)
+  set(ESPTOOL_WRITEFLASH_ARGS -fs detect -fm dio -ff ${FLASH_FREQ})
+else()
+  set(ESPTOOL_WRITEFLASH_ARGS -fs ${FLASH_SIZE} -fm dio -ff ${FLASH_FREQ})
+endif()
+
+if(CONFIG_ESPRESSIF_SECURE_FLASH_ENC_FLASH_DEVICE_ENCRYPTED)
+  list(APPEND ESPTOOL_WRITEFLASH_ARGS --encrypt)
+endif()
+
+set(ESPTOOL_MIN_VERSION 4.8.0)
+if(EXISTS "${SOURCE_DIR}/tools/espressif/check_esptool.py")
+  execute_process(
+    COMMAND ${PYTHON3} ${SOURCE_DIR}/tools/espressif/check_esptool.py -v
+            ${ESPTOOL_MIN_VERSION}
+    RESULT_VARIABLE ESPTOOL_CHECK_RESULT
+    OUTPUT_QUIET ERROR_QUIET)
+  if(NOT ESPTOOL_CHECK_RESULT EQUAL 0)
+    message(
+      WARNING "esptool.py version ${ESPTOOL_MIN_VERSION} or higher recommended")
+  endif()
+endif()
+
+# ESPTOOL_OPTS: -c CHIP_SERIES -p PORT -b BAUD [ --no-stub ]
+set(ESPTOOL_OPTS -c ${CHIP_SERIES} -p ${ESPTOOL_PORT} -b ${ESPTOOL_BAUD})
+if(CONFIG_ESPRESSIF_ESPTOOLPY_NO_STUB)
+  list(APPEND ESPTOOL_OPTS --no-stub)
+endif()
+
+# WRITEFLASH address/file list (same structure as Config.mk WRITEFLASH_OPTS)
+set(ESPTOOL_BINS "")
+
+if(CONFIG_ESPRESSIF_MERGE_BINS)
+  if(NOT EXISTS "${BINARY_DIR}/nuttx.merged.bin")
+    message(
+      FATAL_ERROR
+        "nuttx.merged.bin not found (CONFIG_ESPRESSIF_MERGE_BINS=y). Build first."
+    )
+  endif()
+  set(WRITEFLASH_ARGS ${ESPTOOL_WRITEFLASH_ARGS} 0x0
+                      "${BINARY_DIR}/nuttx.merged.bin")
+else()
+  if(CONFIG_ESPRESSIF_BOOTLOADER_MCUBOOT)
+    set(BOOTLOADER "${NUTTX_DIR}/mcuboot-${CHIP_SERIES}.bin")
+    if(NOT EXISTS "${BOOTLOADER}")
+      message(FATAL_ERROR "MCUboot binary not found: ${BOOTLOADER}")
+    endif()
+    list(APPEND ESPTOOL_BINS ${BL_OFFSET} "${BOOTLOADER}")
+
+    if(NOT EXISTS "${BINARY_DIR}/vefuse.bin")
+      file(WRITE "${BINARY_DIR}/vefuse.bin" "")
+    endif()
+    list(APPEND ESPTOOL_BINS ${EFUSE_FLASH_OFFSET} "${BINARY_DIR}/vefuse.bin")
+
+    if(NOT EXISTS "${BINARY_DIR}/nuttx.bin")
+      message(FATAL_ERROR "nuttx.bin not found in ${BINARY_DIR}")
+    endif()
+    list(APPEND ESPTOOL_BINS ${MCUBOOT_APP_OFFSET} "${BINARY_DIR}/nuttx.bin")
+
+  elseif(CONFIG_ESPRESSIF_SIMPLE_BOOT)
+    if(NOT EXISTS "${BINARY_DIR}/nuttx.bin")
+      message(FATAL_ERROR "nuttx.bin not found in ${BINARY_DIR}")
+    endif()
+    list(APPEND ESPTOOL_BINS ${BL_OFFSET} "${BINARY_DIR}/nuttx.bin")
+  else()
+    if(NOT EXISTS "${BINARY_DIR}/nuttx.bin")
+      message(FATAL_ERROR "nuttx.bin not found in ${BINARY_DIR}")
+    endif()
+    list(APPEND ESPTOOL_BINS 0x0000 "${BINARY_DIR}/nuttx.bin")
+  endif()
+
+  if(CONFIG_ESPRESSIF_SECURE_FLASH_ENC_ENABLED AND CONFIG_ESPRESSIF_SPIFLASH)
+    if(NOT EXISTS "${BINARY_DIR}/enc_mtd.bin")
+      message(
+        FATAL_ERROR
+          "enc_mtd.bin not found; required for SPI flash + flash encryption (build/post-build first)."
+      )
+    endif()
+    list(APPEND ESPTOOL_BINS ${CONFIG_ESPRESSIF_STORAGE_MTD_OFFSET}
+         "${BINARY_DIR}/enc_mtd.bin")
+  endif()
+
+  set(WRITEFLASH_ARGS ${ESPTOOL_WRITEFLASH_ARGS} ${ESPTOOL_BINS})
+endif()
+
+execute_process(
+  COMMAND ${ESPTOOL} ${ESPTOOL_OPTS} write-flash ${WRITEFLASH_ARGS}
+  WORKING_DIRECTORY ${BINARY_DIR}
+  RESULT_VARIABLE FLASH_RESULT)
+
+if(NOT FLASH_RESULT EQUAL 0)
+  message(FATAL_ERROR "esptool write-flash failed (exit ${FLASH_RESULT})")
+endif()
+
+message(STATUS "Flash completed successfully.")