This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers
Published Jan 7, 2020
8.8
HIGHCVSS 3.1
EPSS 13.65%
Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.
Affected products
-
- Version 0.9.1 4.16 v007c.0 Build 180613 Rel.42415nStatusaffectedConstraints-
- Version
- 0.9.1_4.16
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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 13.65% (0.13651) | 96.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.76% (0.13759) | 96.02th | v5 (v2026.06.15) |
| Mar 30, 2025 | 22.00% (0.21995) | 95.29th | v4 (v2025.03.14) |
| Mar 29, 2025 | 33.05% (0.33053) | 95.15th | v4 (v2025.03.14) |
| Mar 28, 2025 | 22.00% (0.21995) | 95.29th | v4 (v2025.03.14) |
| Mar 27, 2025 | 33.05% (0.33053) | 96.29th | v4 (v2025.03.14) |
| Mar 20, 2025 | 22.00% (0.21995) | 95.33th | v4 (v2025.03.14) |
| Mar 19, 2025 | 33.05% (0.33053) | 96.35th | v4 (v2025.03.14) |
| Mar 17, 2025 | 22.00% (0.21995) | 95.32th | v4 (v2025.03.14) |
| Dec 31, 2024 | 2.72% (0.02724) | 90.23th | v3 (v2023.03.01) |
| Jun 4, 2024 | 2.00% (0.02005) | 88.87th | v3 (v2023.03.01) |
| Dec 31, 2023 | 2.22% (0.02223) | 88.35th | v3 (v2023.03.01) |
| Dec 14, 2023 | 1.58% (0.01579) | 85.88th | v3 (v2023.03.01) |
| Oct 27, 2023 | 1.12% (0.01119) | 82.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.98% (0.00980) | 81.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 18.07% (0.18069) | 96.27th | v2 (v2022.01.01) |
| Apr 1, 2022 | 18.07% (0.18069) | 95.94th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.07% (0.18069) | 93.43th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.23% (0.06231) | 82.49th | v1 |
| Jan 6, 2022 | 6.23% (0.06231) | 82.32th | v1 |
| Sep 1, 2021 | 1.46% (0.01459) | 72.46th | v1 |
| Apr 14, 2021 | 1.46% (0.01459) | 0.00th | v1 |
References (2)
- https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware x_refsource_MISCProduct
- https://www.zerodayinitiative.com/advisories/ZDI-19-992/ x_refsource_MISCThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware | x_refsource_MISCProduct | |
| https://www.zerodayinitiative.com/advisories/ZDI-19-992/ | x_refsource_MISCThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.