Since Net Framework v4.5.1 (available as a release preview) replaces v4.5, they are probably spending more effort on getting that ready for release than updating v4.5.
I found this, KB2803821 superseded by KB2803821-v2 (hotfix of july) I do not know if it was already reported
Changelog for x64 and x86. x64 Win7 SP1 13-08-2013 Added KB2862772 (IE10 v10.0.8) KB890830 (MRT - August 2013 - v5.3) KB2849470 KB2859537 (MS has pulled this botched update that is causing BSOD's!) KB2868623 KB2861855 (RDP) KB2862966 KB2863058 KB931125 (August 2013 Roots Update) KB2844286-v2 KB2803821-v2 Removed KB2846071 (IE10 v10.0.7) KB890830 (MRT - July 2013 - v5.2) KB2813170 KB2845690 KB2661254 KB2749655 KB2794119 KB931125 (May 2013 Roots Update) KB2844286 KB2803821 ---------------------------------------- x86 Win7 SP1 13-08-2013 Added KB2862772 (IE10 v10.0.8) KB890830 (MRT - August 2013 - v5.3) KB2849470 KB2859537 (MS has pulled this botched update that is causing BSOD's!) KB2868623 KB2861855 (RDP) KB2862966 KB2863058 KB931125 (August 2013 Roots Update) KB2844286-v2 KB2803821-v2 Removed KB2846071 (IE10 v10.0.7) KB890830 (MRT - July 2013 - v5.2) KB2839229 KB2845690 KB2661254 KB2749655 KB2794119 KB931125 (May 2013 Roots Update) KB2844286 KB2803821
My Changelog New Updates: KB2803821-v2 KB2834140-v2 KB2836943-v2 KB2844286-v2 KB2849470 KB2859537 KB2861855 KB2862966 KB2862973 KB2863058 New Hotfixes: KB2836814 KB2862019 (RDP8.0) KB2863374 KB2863706 KB2866086 KB2866695 KB2866772 KB2868238 KB2869799 (GroupPolicy) KB2870437 KB2871565 KB2870467-x64 KB2732673-v4-x64 Superseded Updates (Verified only for x86, x64 should check it): KB2844286 (by KB2844286-v2) KB2836445-v2 (by KB2849470) KB2781049 (by KB2849470) KB2840947 (by KB2859537) KB2839229 (by KB2859537) KB2821049 (by KB2859537) KB2829069 (by KB2863058) KB2799360 (by KB2836814) KB2847932 (by KB2862019 RDP8.0) KB2840149 (by KB2866695) KB2868623 (by KB2871565) KB2851149-v2 (by KB2871565) Edit: New Update KB2856676 for .NET 3.5 (supersede KB2832414) New Hotfixes: KB2860842-v2 KB2864432-x64