W3M
CVE-2016-9434
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Null pointer safety, defensive checks
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.71%. |
| Exploit ScenarioDerived | A remote attacker could crash the application by dereferencing a null pointer by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.
Affects your stack
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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 NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. w3m allows remote attackers to cause a denial of service (segmentation fault and crash) via a crafted HTML page. Affected products include: Tats W3M. Version information: before 0.5.3.
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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:R/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. w3m allows remote attackers to cause a denial of service (segmentation fault and crash) via a crafted HTML page.
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 null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0).
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
There is an out-of-bounds write in checkType located in etc.c in w3m 0.5.3. Rated high severity (CVSS 7.8), this vulnera
w3m through 0.5.3 is prone to a NULL pointer dereference flaw in formUpdateBuffer in form.c. Rated high severity (CVSS 7
w3m through 0.5.3 is prone to an infinite recursion flaw in HTMLlineproc0 because the feed_table_block_tag function in t
An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within t
An out-of-bounds read flaw was found in w3m, in the growbuf_to_Str function in indep.c. Rated medium severity (CVSS 5.5)
An out-of-bounds read flaw was found in w3m, in the Strnew_size function in Str.c. Rated medium severity (CVSS 5.5), thi
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Rated high severity (CVSS 8.8), this vulnerab
Exploit-DB