CVE-2020-36178
highpriority · track · 42EPSS 0.098 · 96 %ileEUUSEPSS · scored 2026-10-27
oal_ipt_addBridgeIsolationRules on TP-Link TL-WR840N 6_EU_0.9.1_4.16 devices allows OS command injection because a raw string entered from the web interface (an IP address field) is used directly for a call to the system library function (for iptables). NOTE: oal_ipt_addBridgeIsolationRules is not the only function that calls util_execSystem.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9–10
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
- tp-link tl-wr840n firmware= 6_eu_0.9.1_4.16nvdUScpe:2.3:o:tp-link:tl-wr840n_firmware:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/therealunicornsecurity/therealunicornsecurity.github.io/blob/master/_posts/2020-10-11-TPLink.mdcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-36178cnnvd
- https://therealunicornsecurity.github.io/TPLink/cnnvd
- https://www.tp-link.com/fr/support/download/tl-wr840n/v6/#Firmwarecnnvd
- https://github.com/therealunicornsecurity/therealunicornsecurity.github.io/blob/master/_posts/2020-10-11-TPLink.mdenisa_euvd
- https://therealunicornsecurity.github.io/TPLink/enisa_euvd
- https://www.tp-link.com/fr/support/download/tl-wr840n/v6/#Firmwareenisa_euvd
- https://github.com/therealunicornsecurity/therealunicornsecurity.github.io/blob/master/_posts/2020-10-11-TPLink.mdExploitThird Party Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan