diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -3,3 +3,14 @@
   <https://download.bitcoinabc.org/0.21.10/>
 
 This release includes the following features and fixes:
+
+P2P Changes
+-----------
+- The default value for the -peerbloomfilters configuration option (and, thus,
+  NODE_BLOOM support) has been changed to false. This resolves well-known DoS
+  vectors in Bitcoin ABC, especially for nodes with spinning disks. It is not
+  anticipated that this will result in a significant lack of availability of
+  NODE_BLOOM-enabled nodes in the coming years, however, clients which rely on
+  the availability of NODE_BLOOM-supporting nodes on the P2P network should
+  consider the process of migrating to a more modern (and less trustful and
+  privacy-violating) alternative over the coming years.
diff --git a/src/net_processing.h b/src/net_processing.h
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -28,6 +28,7 @@
 
 /** Default for BIP61 (sending reject messages) */
 static constexpr bool DEFAULT_ENABLE_BIP61{false};
+static const bool DEFAULT_PEERBLOOMFILTERS = false;
 
 class PeerLogicValidation final : public CValidationInterface,
                                   public NetEventsInterface {
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -153,8 +153,6 @@
 /** Maximum number of unconnecting headers announcements before DoS score */
 static const int MAX_UNCONNECTING_HEADERS = 10;
 
-static const bool DEFAULT_PEERBLOOMFILTERS = true;
-
 /** Default for -stopatheight */
 static const int DEFAULT_STOPATHEIGHT = 0;
 /** Default for -maxreorgdepth */
diff --git a/test/functional/p2p_node_network_limited.py b/test/functional/p2p_node_network_limited.py
--- a/test/functional/p2p_node_network_limited.py
+++ b/test/functional/p2p_node_network_limited.py
@@ -13,7 +13,6 @@
     msg_getdata,
     msg_verack,
     NODE_BITCOIN_CASH,
-    NODE_BLOOM,
     NODE_NETWORK_LIMITED,
 )
 from test_framework.mininode import (
@@ -70,7 +69,7 @@
     def run_test(self):
         node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
 
-        expected_services = NODE_BLOOM | NODE_BITCOIN_CASH | NODE_NETWORK_LIMITED
+        expected_services = NODE_BITCOIN_CASH | NODE_NETWORK_LIMITED
 
         self.log.info("Check that node has signalled expected services.")
         assert_equal(node.nServices, expected_services)
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -47,7 +47,7 @@
 
 NODE_NETWORK = (1 << 0)
 # NODE_GETUTXO = (1 << 1)
-NODE_BLOOM = (1 << 2)
+# NODE_BLOOM = (1 << 2)
 # NODE_WITNESS = (1 << 3)
 NODE_XTHIN = (1 << 4)
 NODE_BITCOIN_CASH = (1 << 5)