HIGH
w3m: Malformed html tag heap-buffer overflow
Published Dec 12, 2016
8.8
HIGHCVSS 3.0
EPSS 3.22%
Description
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-31. Heap-based buffer overflow in w3m allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted HTML page.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
8.8 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (Red Hat) ▾
4.3 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.22% 0.03224
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03224
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.22% (0.03224) | 87.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.22% (0.03224) | 86.56th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.04% (0.01038) | 75.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.52% (0.02522) | 75.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.04% (0.01038) | 75.88th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.39% (0.01390) | 86.92th | v3 (v2023.03.01) |
| May 8, 2024 | 1.39% (0.01390) | 86.29th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.39% (0.01390) | 84.29th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.67% (0.03666) | 85.01th | v2 (v2022.01.01) |
| Oct 22, 2022 | 3.67% (0.03666) | 84.51th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.25% (0.03249) | 82.64th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.25% (0.03249) | 65.32th | v2 (v2022.01.01) |
Weaknesses (2)
References (9)
- http://www.openwall.com/lists/oss-security/2016/11/18/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/94407 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-9423 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1399664 Issue Tracking
- https://github.com/tats/w3m/blob/master/ChangeLog x_refsource_CONFIRMIssue TrackingPatch
- https://github.com/tats/w3m/issues/9 x_refsource_CONFIRMIssue TrackingPatch
- https://nvd.nist.gov/vuln/detail/CVE-2016-9423
- https://security.gentoo.org/glsa/201701-08 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-9423
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2016/11/18/3 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/94407 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2016-9423 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1399664 | Issue Tracking | |
| https://github.com/tats/w3m/blob/master/ChangeLog | x_refsource_CONFIRMIssue TrackingPatch | |
| https://github.com/tats/w3m/issues/9 | x_refsource_CONFIRMIssue TrackingPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9423 | ||
| https://security.gentoo.org/glsa/201701-08 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2016-9423 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 12, 2016
Updated Aug 6, 2024
Reserved Nov 18, 2016
Link CVE-2016-9423
CISA Vulnrichment
Updated n/a