This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link TL-WR940N 3.20.1 Build 200316 Rel.34392n (5553) routers
Published Mar 28, 2023
8.0
HIGHCVSS 3.1
EPSS 0.72%
Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link TL-WR940N 3.20.1 Build 200316 Rel.34392n (5553) routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13993.
Affected products
-
- Version 3.20.1 Build 200316 Rel.34392n (5553)StatusaffectedConstraints-
- Version
- < 211111
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Feb 19, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.72% (0.00718) | 52.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.72% (0.00724) | 49.05th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00021) | 3.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.05% (0.00051) | 21.81th | v3 (v2023.03.01) |
| May 20, 2024 | 0.05% (0.00051) | 19.32th | v3 (v2023.03.01) |
| Dec 30, 2023 | 0.05% (0.00051) | 17.30th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.05% (0.00048) | 14.96th | v3 (v2023.03.01) |
| May 8, 2023 | 0.07% (0.00068) | 28.02th | v3 (v2023.03.01) |
| Apr 7, 2023 | 0.05% (0.00048) | 14.96th | v3 (v2023.03.01) |
| Mar 29, 2023 | 0.07% (0.00073) | 29.69th | v3 (v2023.03.01) |
References (1)
- https://www.zerodayinitiative.com/advisories/ZDI-22-407/ Third Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-22-407/ | Third Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.