diff --git a/icu4c/source/data/brkitr/rules/word.txt b/icu4c/source/data/brkitr/rules/word.txt
index 3066922be1d..3027574d25d 100644
--- a/icu4c/source/data/brkitr/rules/word.txt
+++ b/icu4c/source/data/brkitr/rules/word.txt
@@ -44,7 +44,7 @@ $Double_Quote       = [\p{Word_Break = Double_Quote}];
 $MidNumLet          = [\p{Word_Break = MidNumLet}];
 $MidLetter          = [\p{Word_Break = MidLetter}];
 $MidNum             = [\p{Word_Break = MidNum}];
-$Numeric            = [\p{Word_Break = Numeric}];
+$Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079
 $ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 $WSegSpace          = [\p{Word_Break = WSegSpace}];
 $Extended_Pict      = [:ExtPict:];
diff --git a/icu4c/source/data/brkitr/rules/word_POSIX.txt b/icu4c/source/data/brkitr/rules/word_POSIX.txt
index 79126931ead..bcf127a42aa 100644
--- a/icu4c/source/data/brkitr/rules/word_POSIX.txt
+++ b/icu4c/source/data/brkitr/rules/word_POSIX.txt
@@ -44,7 +44,7 @@ $Double_Quote       = [\p{Word_Break = Double_Quote}];
 $MidNumLet          = [\p{Word_Break = MidNumLet} - [.]];
 $MidLetter          = [\p{Word_Break = MidLetter} - [\:]];
 $MidNum             = [\p{Word_Break = MidNum} [.]];
-$Numeric            = [\p{Word_Break = Numeric}];
+$Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079
 $ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 $WSegSpace          = [\p{Word_Break = WSegSpace}];
 $Extended_Pict      = [:ExtPict:];
diff --git a/icu4c/source/test/intltest/rbbitst.cpp b/icu4c/source/test/intltest/rbbitst.cpp
index 5467a96b499..3d1c0a8340d 100644
--- a/icu4c/source/test/intltest/rbbitst.cpp
+++ b/icu4c/source/test/intltest/rbbitst.cpp
@@ -1872,7 +1872,7 @@ RBBIWordMonkey::RBBIWordMonkey()
     fMidNumLetSet     = new UnicodeSet(u"[\\p{Word_Break = MidNumLet}]",    status);
     fMidLetterSet     = new UnicodeSet(u"[\\p{Word_Break = MidLetter}]",    status);
     fMidNumSet        = new UnicodeSet(u"[\\p{Word_Break = MidNum}]",       status);
-    fNumericSet       = new UnicodeSet(u"[\\p{Word_Break = Numeric}]",      status);
+    fNumericSet       = new UnicodeSet(u"[[\\p{Word_Break = Numeric}][\\uff10-\\uff19]]", status);
     fFormatSet        = new UnicodeSet(u"[\\p{Word_Break = Format}]",       status);
     fExtendNumLetSet  = new UnicodeSet(u"[\\p{Word_Break = ExtendNumLet}]", status);
     fExtendSet        = new UnicodeSet(u"[\\p{Word_Break = Extend}]",       status);
diff --git a/icu4c/source/test/testdata/break_rules/word.txt b/icu4c/source/test/testdata/break_rules/word.txt
index fc7bc9b1886..9b3e527ee72 100644
--- a/icu4c/source/test/testdata/break_rules/word.txt
+++ b/icu4c/source/test/testdata/break_rules/word.txt
@@ -30,7 +30,7 @@ Double_Quote       = [\p{Word_Break = Double_Quote}];
 MidNumLet          = [\p{Word_Break = MidNumLet}];
 MidLetter          = [\p{Word_Break = MidLetter}];
 MidNum             = [\p{Word_Break = MidNum}];
-Numeric            = [\p{Word_Break = Numeric}];
+Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079;
 ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 WSegSpace          = [\p{Word_Break = WSegSpace}];
 Extended_Pict      = [:ExtPict:];
diff --git a/icu4c/source/test/testdata/break_rules/word_POSIX.txt b/icu4c/source/test/testdata/break_rules/word_POSIX.txt
index 10efc32d210..04bcb321ae9 100644
--- a/icu4c/source/test/testdata/break_rules/word_POSIX.txt
+++ b/icu4c/source/test/testdata/break_rules/word_POSIX.txt
@@ -29,7 +29,7 @@ Double_Quote       = [\p{Word_Break = Double_Quote}];
 MidNumLet          = [\p{Word_Break = MidNumLet} - [.]];
 MidLetter          = [\p{Word_Break = MidLetter} - [\:]];
 MidNum             = [\p{Word_Break = MidNum} [.]];
-Numeric            = [\p{Word_Break = Numeric}];
+Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079;
 ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 WSegSpace          = [\p{Word_Break = WSegSpace}];
 Extended_Pict      = [:ExtPict:];
diff --git a/icu4c/source/test/testdata/rbbitst.txt b/icu4c/source/test/testdata/rbbitst.txt
index 63ba172233d..e9f2a32099a 100644
--- a/icu4c/source/test/testdata/rbbitst.txt
+++ b/icu4c/source/test/testdata/rbbitst.txt
@@ -240,8 +240,7 @@
 <data>•aa\N{COMBINING GRAVE ACCENT}a<200> •</data>
 
 # fullwidth numeric, midletter characters etc should be treated like their halfwidth counterparts
-# <data>•ＩＳＮ'Ｔ<200> •１９<100>日<400></data>
-# why was this added with the dbbi stuff?
+<data>•ＩＳＮ'Ｔ<200> •１９<100>日<400></data>
 
 #      to test for bug #4098467
 #      What follows is a string of Korean characters (I found it in the Yellow Pages
diff --git a/icu4j/main/shared/data/icudata.jar b/icu4j/main/shared/data/icudata.jar
index f34485f69f0..1e5b5cb6067 100644
--- a/icu4j/main/shared/data/icudata.jar
+++ b/icu4j/main/shared/data/icudata.jar
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:70f6389c315809aac32ac3145b5fe813e59de7b8ac13f4a8ead60f58c443cca5
-size 12697817
+oid sha256:1b8bb0208f9fd791029d55f17dd9722d7b4062f5478e55c28722cc7188435507
+size 12690372
diff --git a/icu4j/main/shared/data/icutzdata.jar b/icu4j/main/shared/data/icutzdata.jar
index 1f0a57452ec..829821222ec 100644
--- a/icu4j/main/shared/data/icutzdata.jar
+++ b/icu4j/main/shared/data/icutzdata.jar
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f810eeeeb46325f0b314b2ea0d971ee7c3c850e6160660651aff0be8aaaa27f7
+oid sha256:99a35b2f985a8a281b8474cc074195d23bdc6757ea561d082b5fb94a2d749cb2
 size 92787
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/RBBITestMonkey.java b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/RBBITestMonkey.java
index 7b5803264c8..9a690f9375d 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/RBBITestMonkey.java
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/RBBITestMonkey.java
@@ -330,7 +330,7 @@ public class RBBITestMonkey extends TestFmwk {
             fMidNumLetSet    = new UnicodeSet("[\\p{Word_Break = MidNumLet}]");
             fMidLetterSet    = new UnicodeSet("[\\p{Word_Break = MidLetter}]");
             fMidNumSet       = new UnicodeSet("[\\p{Word_Break = MidNum}]");
-            fNumericSet      = new UnicodeSet("[\\p{Word_Break = Numeric}]");
+            fNumericSet      = new UnicodeSet("[[\\p{Word_Break = Numeric}][\\uFF10-\\uff19]]");
             fFormatSet       = new UnicodeSet("[\\p{Word_Break = Format}]");
             fExtendNumLetSet = new UnicodeSet("[\\p{Word_Break = ExtendNumLet}]");
             fExtendSet       = new UnicodeSet("[\\p{Word_Break = Extend}]");
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word.txt b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word.txt
index fc7bc9b1886..9b3e527ee72 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word.txt
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word.txt
@@ -30,7 +30,7 @@ Double_Quote       = [\p{Word_Break = Double_Quote}];
 MidNumLet          = [\p{Word_Break = MidNumLet}];
 MidLetter          = [\p{Word_Break = MidLetter}];
 MidNum             = [\p{Word_Break = MidNum}];
-Numeric            = [\p{Word_Break = Numeric}];
+Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079;
 ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 WSegSpace          = [\p{Word_Break = WSegSpace}];
 Extended_Pict      = [:ExtPict:];
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word_POSIX.txt b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word_POSIX.txt
index 10efc32d210..04bcb321ae9 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word_POSIX.txt
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/break_rules/word_POSIX.txt
@@ -29,7 +29,7 @@ Double_Quote       = [\p{Word_Break = Double_Quote}];
 MidNumLet          = [\p{Word_Break = MidNumLet} - [.]];
 MidLetter          = [\p{Word_Break = MidLetter} - [\:]];
 MidNum             = [\p{Word_Break = MidNum} [.]];
-Numeric            = [\p{Word_Break = Numeric}];
+Numeric            = [[\p{Word_Break = Numeric}] [\uFF10-\uff19]];  # Patch for ICU-12079;
 ExtendNumLet       = [\p{Word_Break = ExtendNumLet}];
 WSegSpace          = [\p{Word_Break = WSegSpace}];
 Extended_Pict      = [:ExtPict:];