diff --git a/src/bio/bio_xstream.c b/src/bio/bio_xstream.c
index 059556ba89a..f172e6028b1 100644
--- a/src/bio/bio_xstream.c
+++ b/src/bio/bio_xstream.c
@@ -300,7 +300,7 @@ bio_nvme_init_ext(const char *nvme_conf, int numa_node, unsigned int mem_size,
 	}
 
 	if (nvme_conf && strlen(nvme_conf) > 0) {
-		fd = open(nvme_conf, O_RDONLY, 0600);
+		fd = open(nvme_conf, O_RDONLY);
 		if (fd < 0)
 			D_WARN("Open %s failed, skip DAOS NVMe setup "DF_RC"\n",
 			       nvme_conf, DP_RC(daos_errno2der(errno)));
diff --git a/src/common/ad_mem.c b/src/common/ad_mem.c
index 03b3120344a..0c697145174 100644
--- a/src/common/ad_mem.c
+++ b/src/common/ad_mem.c
@@ -1,5 +1,6 @@
 /**
  * (C) Copyright 2022-2023 Intel Corporation.
+ * (C) Copyright 2025 Hewlett Packard Enterprise Development LP
  *
  * SPDX-License-Identifier: BSD-2-Clause-Patent
  */
@@ -608,7 +609,7 @@ blob_file_open(struct ad_blob *blob, const char *path, size_t *size, bool create
 		int	flags = O_RDWR;
 
 		while (1) {
-			fd = open(path, flags, 0600);
+			fd = open(path, flags, UMEM_FILE_MODE_DEFAULT);
 			if (fd >= 0)
 				break;
 
diff --git a/src/include/daos/mem.h b/src/include/daos/mem.h
index 18d8fe988a7..6528967987b 100644
--- a/src/include/daos/mem.h
+++ b/src/include/daos/mem.h
@@ -38,6 +38,8 @@ umempobj_pgsz(int backend);
 /* umem persistent object property flags */
 #define	UMEMPOBJ_ENABLE_STATS	0x1
 
+#define UMEM_FILE_MODE_DEFAULT  0660
+
 #ifdef DAOS_PMEM_BUILD
 
 /* The backend type is stored in meta blob header, don't change the value */
diff --git a/src/mgmt/mgmt_common.c b/src/mgmt/mgmt_common.c
index 6cf29102fa9..af1f90cd6c2 100644
--- a/src/mgmt/mgmt_common.c
+++ b/src/mgmt/mgmt_common.c
@@ -163,7 +163,7 @@ ds_mgmt_tgt_recreate(uuid_t pool_uuid, daos_size_t scm_size, int tgt_nr, daos_si
 			rc = -DER_NONEXIST;
 			goto out;
 		}
-		fd = open(rdb_path, O_RDWR | O_CREAT, 0600);
+		fd = open(rdb_path, O_RDWR | O_CREAT, UMEM_FILE_MODE_DEFAULT);
 		if (fd < 0) {
 			rc = daos_errno2der(errno);
 			D_ERROR("failed to create/open the vos file %s:" DF_RC "\n", rdb_path,
@@ -215,7 +215,7 @@ ds_mgmt_tgt_preallocate(uuid_t uuid, daos_size_t scm_size, int tgt_id, const cha
 	D_DEBUG(DB_MGMT, DF_UUID ": creating vos file %s (%ld bytes)\n", DP_UUID(uuid), path,
 		scm_size);
 
-	fd = open(path, O_CREAT | O_RDWR, 0600);
+	fd = open(path, O_CREAT | O_RDWR, UMEM_FILE_MODE_DEFAULT);
 	if (fd < 0) {
 		rc = daos_errno2der(errno);
 		D_ERROR(DF_UUID ": failed to create vos file %s: " DF_RC "\n", DP_UUID(uuid), path,
diff --git a/src/vos/vos_common.c b/src/vos/vos_common.c
index a7397a94256..ea46a50bec5 100644
--- a/src/vos/vos_common.c
+++ b/src/vos/vos_common.c
@@ -979,7 +979,7 @@ vos_self_nvme_init(const char *vos_path, bool init_spdk)
 		goto out;
 
 	/* Only use hugepages if NVME SSD configuration existed. */
-	fd = open(nvme_conf, O_RDONLY, 0600);
+	fd = open(nvme_conf, O_RDONLY);
 	if (fd < 0) {
 		rc = bio_nvme_init_ext(NULL, VOS_NVME_NUMA_NODE, 0, 0, VOS_NVME_NR_TARGET, true,
 				       init_spdk);
diff --git a/src/vos/vos_pool.c b/src/vos/vos_pool.c
index 96d516b32dd..513d0a928ef 100644
--- a/src/vos/vos_pool.c
+++ b/src/vos/vos_pool.c
@@ -996,7 +996,8 @@ vos_pmemobj_create(const char *path, uuid_t pool_id, const char *layout,
 umem_create:
 	D_DEBUG(DB_MGMT, "umempobj_create sz: " DF_U64 " store_sz: " DF_U64, scm_sz,
 		store.stor_size);
-	pop = umempobj_create(path, layout, UMEMPOBJ_ENABLE_STATS, scm_sz, 0600, &store);
+	pop = umempobj_create(path, layout, UMEMPOBJ_ENABLE_STATS, scm_sz, UMEM_FILE_MODE_DEFAULT,
+			      &store);
 	if (pop != NULL) {
 		*ph = pop;
 		return 0;