diff --git a/poi/src/main/java/org/apache/poi/sl/extractor/SlideShowExtractor.java b/poi/src/main/java/org/apache/poi/sl/extractor/SlideShowExtractor.java
index 1b1480caa6..7579f8a9f8 100644
--- a/poi/src/main/java/org/apache/poi/sl/extractor/SlideShowExtractor.java
+++ b/poi/src/main/java/org/apache/poi/sl/extractor/SlideShowExtractor.java
@@ -364,6 +364,10 @@ public class SlideShowExtractor<
         // PowerPoint seems to store files with \r as the line break
         // The messes things up on everything but a Mac, so translate them to \n
         String txt = tr.getRawText();
+        if (txt == null) {
+            return "";
+        }
+
         txt = txt.replace('\r', '\n');
         txt = txt.replace((char) 0x0B, sep);
 
diff --git a/test-data/slideshow/clusterfuzz-testcase-minimized-POIXSLFFuzzer-4986044400861184.pptx b/test-data/slideshow/clusterfuzz-testcase-minimized-POIXSLFFuzzer-4986044400861184.pptx
new file mode 100644
index 0000000000..df4a713ff0
Binary files /dev/null and b/test-data/slideshow/clusterfuzz-testcase-minimized-POIXSLFFuzzer-4986044400861184.pptx differ
diff --git a/test-data/spreadsheet/stress.xls b/test-data/spreadsheet/stress.xls
index b715df6bdc..24d91b2661 100644
Binary files a/test-data/spreadsheet/stress.xls and b/test-data/spreadsheet/stress.xls differ