CVE-2019-17147 in the critical feed json
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers.
published 2020-01-07 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7604
- cvss
- 8.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 13.7%
- EPSS 13.7% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
13.65% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- TP-Link TL-WR841N
Classification
- Weakness
-
- CWE-120 Buffer Copy without Checking Size of Input
References
-
zerodayinitiative.com
/advisories/ZDI-19-992/
third-party-advisory, vdb-entry
-
tp-link.com
/us/support/download/tl-wr841n/#Firmware
product
Sources
- CVE List CVE-2019-17147
- NVD CVE-2019-17147
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.