PatchTheCVE: pdftools projecthttps://patchthecve.com/CVEs with upgrade or downgrade fix stepsCVE-2021-39543: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39543.htmlhttps://patchthecve.com/cve/CVE-2021-39543.htmlWed, 17 Jun 2026 04:03:47 +0000MEDIUM 5.5: An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.CVE-2021-39542: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39542.htmlhttps://patchthecve.com/cve/CVE-2021-39542.htmlWed, 17 Jun 2026 04:03:47 +0000MEDIUM 5.5: An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Font::Size() located in font.cpp. It allows an attacker to cause Denial of Service.CVE-2021-39541: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39541.htmlhttps://patchthecve.com/cve/CVE-2021-39541.htmlWed, 17 Jun 2026 04:03:47 +0000MEDIUM 5.5: An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeXref() located in analyze.cpp. It allows an attacker to cause Denial of Service.CVE-2021-39540: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39540.htmlhttps://patchthecve.com/cve/CVE-2021-39540.htmlWed, 17 Jun 2026 04:03:47 +0000HIGH 7.8: An issue was discovered in pdftools through 20200714. A stack-buffer-overflow exists in the function Analyze::AnalyzePages() located in analyze.cpp. It allows an attacker to cause code Execution.CVE-2021-39539: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39539.htmlhttps://patchthecve.com/cve/CVE-2021-39539.htmlWed, 17 Jun 2026 04:03:46 +0000MEDIUM 5.5: An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function node::BDCNode::~BDCNode() located in bdcnode.cpp. It allows an attacker to cause Denial of Service.CVE-2021-39538: An issue was discovered in pdftools through 20200714https://patchthecve.com/cve/CVE-2021-39538.htmlhttps://patchthecve.com/cve/CVE-2021-39538.htmlWed, 17 Jun 2026 04:03:46 +0000MEDIUM 5.5: An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function node::ObjNode::Value() located in objnode.cpp. It allows an attacker to cause Denial of Service.