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Sumatrapdfreader

10 CVEs vendor

Monthly

CVE-2026-25961 Feb 09, 22:16 HIGH POC This Week

SumatraPDF versions 3.5.0 through 3.5.2 fail to validate TLS certificates during software updates and execute installers without signature verification, allowing network attackers to perform man-in-the-middle attacks and inject malicious code. An attacker with any valid TLS certificate can intercept update requests and redirect users to a malicious installer, achieving arbitrary code execution on Windows systems. Public exploit code exists for this vulnerability and no patch is currently available.

Windows TLS Sumatrapdf Sumatrapdfreader
NVD GitHub Exploit-DB VulDB
CVSS 3.1
7.5
EPSS
0.0%
CVE-2026-25880 Feb 09, 22:16 HIGH POC This Week

SumatraPDF 3.5.2 and earlier on Windows allows arbitrary code execution when a user opens a PDF and selects "Show in folder," as the application executes a malicious explorer.exe binary from the same directory without warning. Public exploit code exists for this vulnerability, which affects any user who opens untrusted PDFs and interacts with the file menu option. An attacker can achieve code execution with the privileges of the victim's user account through a simple social engineering attack.

Windows Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
7.8
EPSS
0.0%
CVE-2026-23512 Jan 14, 21:15 HIGH POC PATCH This Week

SumatraPDF 3.5.2 and earlier on Windows contains an untrusted search path vulnerability in the Advanced Options feature that allows arbitrary code execution through a malicious notepad.exe placed in the application directory. An attacker with local access can exploit this when a user triggers the Advanced Options setting, as the application fails to specify an absolute path when launching notepad.exe. Public exploit code exists for this vulnerability, and a patch is available.

Windows Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
8.6
EPSS
0.0%
CVE-2026-55586 Aug 20, 16:35 MEDIUM This Month

Heap buffer overflow in SumatraPDF 3.6.1 and earlier enables an attacker who delivers a crafted CHM file to corrupt parser heap memory via malformed LZX Huffman code lengths. The PRETREE path in make_decode_table writes internal Huffman tree nodes beyond the 104-entry PRETREE_table boundary into adjacent struct LZXstate heap memory, reachable through the chm_open → chm_retrieve_object → LZXdecompress → BUILD_TABLE call chain. No public exploit or active exploitation is confirmed; arbitrary code execution has not been demonstrated, though the upstream fix commit validates that reliable heap corruption is achievable.

RCE Buffer Overflow Microsoft Canonical Sumatrapdf +1
NVD GitHub
CVSS 3.1
6.6
EPSS
0.1%
CVE-2026-25920 Feb 09, 22:16 MEDIUM POC This Month

SumatraPDF versions 3.5.2 and earlier are vulnerable to a heap buffer over-read in the MOBI file parser due to incomplete bounds validation in the HuffDic decompressor, allowing attackers to crash the application by opening a malicious .mobi file. Public exploit code exists for this vulnerability. Local user interaction is required to trigger the vulnerability, and while denial of service is the primary impact, the out-of-bounds read could potentially leak sensitive memory contents.

Windows Denial Of Service Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
5.5
EPSS
0.0%
CVE-2026-23951 Jan 22, 01:15 MEDIUM POC This Month

SumatraPDF on Windows is vulnerable to a denial-of-service attack through a maliciously crafted Mobi file that triggers an integer underflow in record validation, causing an out-of-bounds heap read and application crash. The vulnerability stems from an off-by-one error in the PalmDbReader::GetRecord function that only occurs with exactly 2 records, and public exploit code is available. No patch has been released at this time.

Windows Denial Of Service Integer Overflow Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
5.5
EPSS
0.0%
CVE-2025-57248 Sep 15, 16:15 HIGH POC This Month

A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the processing of a crafted .djvu file. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Denial Of Service Null Pointer Dereference Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
7.3
EPSS
0.1%
CVE-2023-33802 Jul 26, 20:15 MEDIUM POC This Month

A buffer overflow in SumatraPDF Reader v3.4.6 allows attackers to cause a Denial of Service (DoS) via a crafted text file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow Denial Of Service Sumatrapdf Sumatrapdfreader
NVD GitHub
CVSS 3.1
5.5
EPSS
0.3%
CVE-2012-4896 Oct 05, 10:51 CRITICAL Act Now

Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability than CVE-2012-4895. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.

RCE Buffer Overflow Sumatrapdf Sumatrapdfreader
NVD
CVSS 2.0
9.3
EPSS
8.5%
CVE-2012-4895 Oct 05, 10:51 CRITICAL Act Now

Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability than CVE-2012-4896. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.

RCE Buffer Overflow Sumatrapdf Sumatrapdfreader
NVD
CVSS 2.0
9.3
EPSS
8.5%
EPSS 0% CVSS 7.5
HIGH POC This Week

SumatraPDF versions 3.5.0 through 3.5.2 fail to validate TLS certificates during software updates and execute installers without signature verification, allowing network attackers to perform man-in-the-middle attacks and inject malicious code. An attacker with any valid TLS certificate can intercept update requests and redirect users to a malicious installer, achieving arbitrary code execution on Windows systems. Public exploit code exists for this vulnerability and no patch is currently available.

Windows TLS Sumatrapdf +1
NVD GitHub Exploit-DB VulDB
EPSS 0% CVSS 7.8
HIGH POC This Week

SumatraPDF 3.5.2 and earlier on Windows allows arbitrary code execution when a user opens a PDF and selects "Show in folder," as the application executes a malicious explorer.exe binary from the same directory without warning. Public exploit code exists for this vulnerability, which affects any user who opens untrusted PDFs and interacts with the file menu option. An attacker can achieve code execution with the privileges of the victim's user account through a simple social engineering attack.

Windows Sumatrapdf Sumatrapdfreader
NVD GitHub
EPSS 0% CVSS 8.6
HIGH POC PATCH This Week

SumatraPDF 3.5.2 and earlier on Windows contains an untrusted search path vulnerability in the Advanced Options feature that allows arbitrary code execution through a malicious notepad.exe placed in the application directory. An attacker with local access can exploit this when a user triggers the Advanced Options setting, as the application fails to specify an absolute path when launching notepad.exe. Public exploit code exists for this vulnerability, and a patch is available.

Windows Sumatrapdf Sumatrapdfreader
NVD GitHub
EPSS 0% CVSS 6.6
MEDIUM This Month

Heap buffer overflow in SumatraPDF 3.6.1 and earlier enables an attacker who delivers a crafted CHM file to corrupt parser heap memory via malformed LZX Huffman code lengths. The PRETREE path in make_decode_table writes internal Huffman tree nodes beyond the 104-entry PRETREE_table boundary into adjacent struct LZXstate heap memory, reachable through the chm_open → chm_retrieve_object → LZXdecompress → BUILD_TABLE call chain. No public exploit or active exploitation is confirmed; arbitrary code execution has not been demonstrated, though the upstream fix commit validates that reliable heap corruption is achievable.

RCE Buffer Overflow Microsoft +3
NVD GitHub
EPSS 0% CVSS 5.5
MEDIUM POC This Month

SumatraPDF versions 3.5.2 and earlier are vulnerable to a heap buffer over-read in the MOBI file parser due to incomplete bounds validation in the HuffDic decompressor, allowing attackers to crash the application by opening a malicious .mobi file. Public exploit code exists for this vulnerability. Local user interaction is required to trigger the vulnerability, and while denial of service is the primary impact, the out-of-bounds read could potentially leak sensitive memory contents.

Windows Denial Of Service Sumatrapdf +1
NVD GitHub
EPSS 0% CVSS 5.5
MEDIUM POC This Month

SumatraPDF on Windows is vulnerable to a denial-of-service attack through a maliciously crafted Mobi file that triggers an integer underflow in record validation, causing an out-of-bounds heap read and application crash. The vulnerability stems from an off-by-one error in the PalmDbReader::GetRecord function that only occurs with exactly 2 records, and public exploit code is available. No patch has been released at this time.

Windows Denial Of Service Integer Overflow +2
NVD GitHub
EPSS 0% CVSS 7.3
HIGH POC This Month

A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the processing of a crafted .djvu file. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Denial Of Service Null Pointer Dereference Sumatrapdf +1
NVD GitHub
EPSS 0% CVSS 5.5
MEDIUM POC This Month

A buffer overflow in SumatraPDF Reader v3.4.6 allows attackers to cause a Denial of Service (DoS) via a crafted text file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Buffer Overflow Denial Of Service Sumatrapdf +1
NVD GitHub
EPSS 8% CVSS 9.3
CRITICAL Act Now

Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability than CVE-2012-4895. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.

RCE Buffer Overflow Sumatrapdf +1
NVD
EPSS 8% CVSS 9.3
CRITICAL Act Now

Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability than CVE-2012-4896. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.

RCE Buffer Overflow Sumatrapdf +1
NVD

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