diff --git a/.gitmodules b/.gitmodules
index 8c148b3c7c..424a8ec371 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -68,7 +68,7 @@ fxDONOTUSEurl = https://github.com/ESCOMP/mizuRoute
 [submodule "ccs_config"]
 path = ccs_config
 url = https://github.com/ESMCI/ccs_config_cesm.git
-fxtag = ccs_config_cesm1.0.48
+fxtag = ccs_config_cesm1.0.56
 fxrequired = ToplevelRequired
 # Standard Fork to compare to with "git fleximod test" to ensure personal forks aren't committed
 fxDONOTUSEurl = https://github.com/ESMCI/ccs_config_cesm.git
@@ -76,7 +76,7 @@ fxDONOTUSEurl = https://github.com/ESMCI/ccs_config_cesm.git
 [submodule "cime"]
 path = cime
 url = https://github.com/ESMCI/cime
-fxtag = cime6.1.112
+fxtag = cime6.1.113
 fxrequired = ToplevelRequired
 # Standard Fork to compare to with "git fleximod test" to ensure personal forks aren't committed
 fxDONOTUSEurl = https://github.com/ESMCI/cime
diff --git a/ccs_config b/ccs_config
index 4b5e4eb54d..e2540807a5 160000
--- a/ccs_config
+++ b/ccs_config
@@ -1 +1 @@
-Subproject commit 4b5e4eb54d6a0ec7de59065b897d2de2524e0ecf
+Subproject commit e2540807a54a45278901574df08ddc8c7f61d1d8
diff --git a/cime b/cime
index 6fb4e9e1a3..1616f81668 160000
--- a/cime
+++ b/cime
@@ -1 +1 @@
-Subproject commit 6fb4e9e1a3bcb72f9251fc86b90660fc59f7da12
+Subproject commit 1616f81668cd061597487338980ab2608b5c9034
diff --git a/cime_config/testdefs/ExpectedTestFails.xml b/cime_config/testdefs/ExpectedTestFails.xml
index c54ee94c89..47dd00c658 100644
--- a/cime_config/testdefs/ExpectedTestFails.xml
+++ b/cime_config/testdefs/ExpectedTestFails.xml
@@ -98,6 +98,24 @@
   </test>
 
   <!-- aux_clm test suite failures -->
+  <test name="MKSURFDATAESMF_P128x1.f10_f10_mg37.I1850Clm50BgcCrop.derecho_intel">
+    <phase name="NLCOMP">
+      <status>FAIL</status>
+      <issue>#3453</issue>
+    </phase>
+  </test>
+  <test name="SUBSETDATAPOINT_Ld5_D_Mmpi-serial.CLM_USRDAT.I2000Clm60BgcCropCrujra.derecho_intel.clm-default">
+    <phase name="NLCOMP">
+      <status>FAIL</status>
+      <issue>#3454</issue>
+    </phase>
+  </test>
+  <test name="SUBSETDATAREGION_Ld5_D_Mmpi-serial.CLM_USRDAT.I2000Clm60BgcCropCrujra.derecho_intel.clm-default">
+    <phase name="NLCOMP">
+      <status>FAIL</status>
+      <issue>#3454</issue>
+    </phase>
+  </test>
   <test name="LII2FINIDATAREAS_D_P256x2_Ld1.f09_t232.I1850Clm60BgcCrop.derecho_intel.clm-default">
     <phase name="RUN">
       <status>FAIL</status>
@@ -164,9 +182,9 @@
   </test>
 
   <test name="SMS_D.f10_f10_mg37.I2000Clm60BgcCrop.derecho_nvhpc.clm-crop">
-    <phase name="SETUP">
+    <phase name="RUN">
       <status>FAIL</status>
-      <issue>#1733 and #3180</issue>
+      <issue>#1733</issue>
     </phase>
   </test>
 
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 69dc644440..c41de96e12 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,4 +1,79 @@
 ===============================================================
+Tag name: ctsm5.3.073
+Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310)
+Date: Thu 28 Aug 2025 01:10:16 PM MDT
+One-line Summary: Update .gitmodules to cesm3_0_alpha07c
+
+Purpose and description of changes
+----------------------------------
+ Update ccs_config_cesm1.0.48 to ccs_config_cesm1.0.56.
+ Update cime6.1.112 to cime6.1.113.
+ Answers change in gnu and nvhpc tests on derecho (details below).
+ New bugs found and reported in issues
+ #3453 FAIL MKSURFDATAESMF_...intel NLCOMP
+ #3454 FAIL SUBSETDATA* tests NLCOMP
+
+Significant changes to scientifically-supported configurations
+--------------------------------------------------------------
+
+Does this tag change answers significantly for any of the following physics configurations?
+(Details of any changes will be given in the "Answer changes" section below.)
+
+    [Put an [X] in the box for any configuration with significant answer changes.]
+
+[ ] clm6_0
+
+[ ] clm5_0
+
+[ ] ctsm5_0-nwp
+
+[ ] clm4_5
+
+
+Bugs fixed
+----------
+List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:
+ Resolves #3411 Update cime and ccs_config versions to those used in cesm3_0_alpha07c
+ Resolves #3180 nvhpc module setup problem in ctsm5.3.050 with ccs_config1.0.43
+
+Testing summary:
+----------------
+
+ [PASS means all tests PASS; OK means tests PASS other than expected fails.]
+
+  build-namelist tests (if CLMBuildNamelist.pm has changed):
+
+    derecho - PASS
+
+  regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):
+
+    derecho ----- OK
+    izumi ------- OK
+
+Answer changes
+--------------
+
+Changes answers relative to baseline: Yes
+
+  Summarize any changes to answers, i.e.,
+    - what platforms/compilers: gnu and nvhpc on derecho
+    - nature of change: roundoff
+
+ Answers change due to the following:
+ ccs_config1.0.49 -- Moves the NVHPC compiler version back a bit on Derecho, which changes answers
+ ccs_config1.0.52 -- Updates the GNU compiler version on Derecho, which changes answers
+
+Other details
+-------------
+List any git submodules updated (cime, rtm, mosart, cism, fates, etc.):
+ ccs_config_cesm1.0.48 --> ccs_config_cesm1.0.56
+ cime6.1.112 --> cime6.1.113
+
+Pull Requests that document the changes (include PR ids):
+ https://github.com/ESCOMP/ctsm/pull/3422
+
+===============================================================
+===============================================================
 Tag name: ctsm5.3.072
 Originator(s): jinmuluo (Jinmu Luo, Cornell University)
 Date: Tue 26 Aug 2025 02:53:26 PM MDT
diff --git a/doc/ChangeSum b/doc/ChangeSum
index b8340937d7..832bf08ad4 100644
--- a/doc/ChangeSum
+++ b/doc/ChangeSum
@@ -1,5 +1,6 @@
 Tag                   Who      Date  Summary
 ============================================================================================================================
+       ctsm5.3.073   slevis 08/28/2025 Update .gitmodules to cesm3_0_alpha07c
        ctsm5.3.072 jinmuluo 08/26/2025 New vertical movement scheme for soil nitrate
        ctsm5.3.071 samrabin 08/22/2025 Merge b4b-dev to master
        ctsm5.3.070 glemieux 08/22/2025 Update default FATES parameter file and add FATES managed fire namelist option