diff --git a/src/Mod/Draft/App/dxf.cpp b/src/Mod/Draft/App/dxf.cpp
index 3d41ee72e0..4f5bff5e4d 100644
--- a/src/Mod/Draft/App/dxf.cpp
+++ b/src/Mod/Draft/App/dxf.cpp
@@ -164,12 +164,15 @@ void CDxfWrite::WriteEllipse(const double* c, double major_radius, double minor_
 CDxfRead::CDxfRead(const char* filepath)
 {
     // start the file
+    memset( m_str, '\0', sizeof(m_str) );
     memset( m_unused_line, '\0', sizeof(m_unused_line) );
     m_fail = false;
     m_aci = 0;
     m_eUnits = eMillimeters;
     m_measurement_inch = false;
     strcpy(m_layer_name, "0");  // Default layer name
+    memset( m_section_name, '\0', sizeof(m_section_name) );
+    memset( m_block_name, '\0', sizeof(m_block_name) );
     m_ignore_errors = true;
 
     m_ifs = new ifstream(filepath);
@@ -406,7 +409,7 @@ bool CDxfRead::ReadArc()
     double start_angle = 0.0;// in degrees
     double end_angle = 0.0;
     double radius = 0.0;
-    double c[3]; // centre
+    double c[3] = {0,0,0}; // centre
     double z_extrusion_dir = 1.0;
     bool hidden = false;
     
@@ -946,7 +949,7 @@ static bool poly_prev_found = false;
 static double poly_prev_x;
 static double poly_prev_y;
 static double poly_prev_z;
-static double poly_prev_bulge_found;
+static bool poly_prev_bulge_found = false;
 static double poly_prev_bulge;
 static bool poly_first_found = false;
 static double poly_first_x;
@@ -1318,13 +1321,10 @@ void CDxfRead::OnReadEllipse(const double* c, const double* m, double ratio, dou
 
 bool CDxfRead::ReadInsert()
 {
-    double c[3]; // coordinate
-    double s[3]; // scale
+    double c[3] = {0,0,0}; // coordinate
+    double s[3] = {1,1,1}; // scale
     double rot = 0.0; // rotation
-    char name[1024];
-    s[0] = 1.0;
-    s[1] = 1.0;
-    s[2] = 1.0;
+    char name[1024] = {0};
 
     while(!((*m_ifs).eof()))
     {
@@ -1413,9 +1413,9 @@ bool CDxfRead::ReadInsert()
 
 bool CDxfRead::ReadDimension()
 {
-    double s[3]; // startpoint
-    double e[3]; // endpoint
-    double p[3]; // dimpoint
+    double s[3] = {0,0,0}; // startpoint
+    double e[3] = {0,0,0}; // endpoint
+    double p[3] = {0,0,0}; // dimpoint
     double rot = -1.0; // rotation
 
     while(!((*m_ifs).eof()))
diff --git a/src/Mod/Import/App/dxf.cpp b/src/Mod/Import/App/dxf.cpp
index 2468e6ec29..2eced7230c 100644
--- a/src/Mod/Import/App/dxf.cpp
+++ b/src/Mod/Import/App/dxf.cpp
@@ -1663,12 +1663,15 @@ void CDxfWrite::writeObjectsSection(void)
 CDxfRead::CDxfRead(const char* filepath)
 {
     // start the file
+    memset( m_str, '\0', sizeof(m_str) );
     memset( m_unused_line, '\0', sizeof(m_unused_line) );
     m_fail = false;
     m_aci = 0;
     m_eUnits = eMillimeters;
     m_measurement_inch = false;
     strcpy(m_layer_name, "0");  // Default layer name
+    memset( m_section_name, '\0', sizeof(m_section_name) );
+    memset( m_block_name, '\0', sizeof(m_block_name) );
     m_ignore_errors = true;
 
     m_ifs = new ifstream(filepath);
@@ -2445,7 +2448,7 @@ static bool poly_prev_found = false;
 static double poly_prev_x;
 static double poly_prev_y;
 static double poly_prev_z;
-static double poly_prev_bulge_found;
+static bool poly_prev_bulge_found = false;
 static double poly_prev_bulge;
 static bool poly_first_found = false;
 static double poly_first_x;
@@ -2818,12 +2821,9 @@ void CDxfRead::OnReadEllipse(const double* c, const double* m, double ratio, dou
 bool CDxfRead::ReadInsert()
 {
     double c[3] = {0,0,0}; // coordinate
-    double s[3] = {0,0,0}; // scale
+    double s[3] = {1,1,1}; // scale
     double rot = 0.0; // rotation
-    char name[1024];
-    s[0] = 1.0;
-    s[1] = 1.0;
-    s[2] = 1.0;
+    char name[1024] = {0};
 
     while(!((*m_ifs).eof()))
     {
diff --git a/src/Mod/Path/libarea/dxf.cpp b/src/Mod/Path/libarea/dxf.cpp
index 4deb9ff71b..38bd8276fc 100644
--- a/src/Mod/Path/libarea/dxf.cpp
+++ b/src/Mod/Path/libarea/dxf.cpp
@@ -166,10 +166,13 @@ CDxfRead::CDxfRead(const char* filepath)
 {
 	m_aci = 0;
 	// start the file
+	memset( m_str, '\0', sizeof(m_str) );
 	memset( m_unused_line, '\0', sizeof(m_unused_line) );
 	m_fail = false;
 	m_eUnits = eMillimeters;
 	strcpy(m_layer_name, "0");	// Default layer name
+	memset( m_section_name, '\0', sizeof(m_section_name) );
+	memset( m_block_name, '\0', sizeof(m_block_name) );
 	m_ignore_errors = true;
 
 	m_ifs = new ifstream(filepath);
@@ -908,7 +911,7 @@ static bool poly_prev_found = false;
 static double poly_prev_x;
 static double poly_prev_y;
 static double poly_prev_z;
-static double poly_prev_bulge_found;
+static bool poly_prev_bulge_found = false;
 static double poly_prev_bulge;
 static bool poly_first_found = false;
 static double poly_first_x;
@@ -1155,7 +1158,7 @@ bool CDxfRead::ReadPolyLine()
 	bool closed = false;
 	int flags;
 	bool first_vertex_section_found = false;
-	double first_vertex[3];
+	double first_vertex[3] = {0};
 	bool bulge_found;
 	double bulge;
 
@@ -1256,13 +1259,10 @@ void CDxfRead::OnReadEllipse(const double* c, const double* m, double ratio, dou
 
 bool CDxfRead::ReadInsert()
 {
-    double c[3]; // coordinate
-    double s[3]; // scale
+    double c[3] = {0,0,0}; // coordinate
+    double s[3] = {1,1,1}; // scale
     double rot = 0.0; // rotation
-    char name[1024];
-    s[0] = 1.0;
-    s[1] = 1.0;
-    s[2] = 1.0;
+    char name[1024] = {0};
 
     while(!((*m_ifs).eof()))
     {