Irfanview
CVE-2020-13878
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.10%. |
| Exploit ScenarioDerived | A remote attacker could write data beyond allocated buffer boundaries leading to code execution or crashes by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAIv1 – Mar 28, 2026
IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+27ef heap-based out-of-bounds write. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Earlier versions of this analysis (1)
Heap OOB write in IrfanView B3D plugin.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+27ef heap-based out-of-bounds write. Affected products include: Irfanview B3D. Version information: version 4.56.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+27ef heap-based out-of-bounds write.
Executive ViewAI
Organizations using IrfanView B3D PlugIns before version 4.56 face critical risk from CVE-2020-13878, a out-of-bounds write vulnerability rated CVSS 9.8. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
Affected Products (CPE)CVE.org
Stack-based buffer overflow in the JPEG2000 plugin in IrfanView PlugIns before 4.33 allows remote attackers to execute a
Heap-based buffer overflow in jpeg_ls.dll in the Jpeg_LS (aka JLS) plugin in the formats plugins in IrfanView PlugIns be
Heap-based buffer overflow in the FlashPix PlugIn before 4.3.4.0 for IrfanView might allow remote attackers to execute a
Double free vulnerability in the Free_All_Memory function in jpeg/dectile.c in libfpx before 1.3.1-1, as used in the Fla
The WPG plugin before 3.1.0.0 for IrfanView 4.57 has a Read Access Violation on Control Flow starting at WPG!ReadWPG_W+0
In IrfanView 4.53, Data from a Faulting Address controls a subsequent Write Address starting at image00400000+0x00000000
IrfanView 4.52 has a User Mode Write AV starting at image00400000+0x00000000000249c6. Rated high severity (CVSS 7.8), th
IrfanView 4.52 has a User Mode Write AV starting at image00400000+0x0000000000013a98. Rated high severity (CVSS 7.8), th
The WPG plugin before 3.1.0.0 for IrfanView 4.57 has a user-mode write access violation starting at WPG+0x0000000000012e
irfanView 4.56 contains an error processing parsing files of type .pcx. Rated high severity (CVSS 7.5), this vulnerabili
Buffer overflow in IrfanView before 4.37, when a multibyte-character directory name is used, allows user-assisted remote
IrfanView B3D PlugIns before version 4.56 has a B3d.dll!+1cbf heap-based out-of-bounds write. Rated critical severity (C
Exploit-DB