diff --git a/Dockerfile.windows b/Dockerfile.windows
index 312eb96d11..0a8c800649 100644
--- a/Dockerfile.windows
+++ b/Dockerfile.windows
@@ -46,7 +46,7 @@ ARG KUBERNETES_VERSION=dev
 ENV CRICTL_VERSION="v1.29.0"
 ENV CALICO_VERSION="v3.28.1"
 ENV CNI_PLUGIN_VERSION="v1.4.1"
-ENV FLANNEL_VERSION="v0.25.4"
+ENV FLANNEL_VERSION="v0.25.5"
 ENV CNI_FLANNEL_VERSION="v1.4.1-flannel1"
 
 RUN mkdir -p rancher
diff --git a/charts/chart_versions.yaml b/charts/chart_versions.yaml
index 51f8e7873e..ec9b513332 100644
--- a/charts/chart_versions.yaml
+++ b/charts/chart_versions.yaml
@@ -23,7 +23,7 @@ charts:
   - version: v4.0.206
     filename: /charts/rke2-multus.yaml
     bootstrap: true
-  - version: v0.25.400
+  - version: v0.25.500
     filename: /charts/rke2-flannel.yaml
     bootstrap: true
   - version: 1.8.000
diff --git a/scripts/build-images b/scripts/build-images
index 842ea42e87..cf4129f8c6 100755
--- a/scripts/build-images
+++ b/scripts/build-images
@@ -102,8 +102,8 @@ xargs -n1 -t docker image pull --quiet << EOF > build/images-harvester.txt
 EOF
 
 xargs -n1 -t docker image pull --quiet << EOF > build/images-flannel.txt
-    ${REGISTRY}/rancher/hardened-flannel:v0.25.4-build20240610
-    ${REGISTRY}/rancher/hardened-cni-plugins:v1.4.1-build20240430
+    ${REGISTRY}/rancher/hardened-flannel:v0.25.5-build20240801
+    ${REGISTRY}/rancher/hardened-cni-plugins:v1.5.1-build20240805
 EOF
 fi
 # Continue to provide a legacy airgap archive set with the default CNI images