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Critical severity · published Jan 6, 2021
CVE-2020-36178
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)…
9.8
CVSS
9.8%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)9.8% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TF
Tl-wr840n Firmware · Tp-link
6_eu_0.9.1_4.16 · source: NVD
Affected product
TF
Tl-wr840n Firmware
Tp-link
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36178
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36178
Exploit
https://github.com/therealunicornsecurity/therealunicornsecurity.github.io/blob/master/_posts/2020-10-11-TPLink.md
Exploit
https://therealunicornsecurity.github.io/TPLink/
Vendor Advisory
https://www.tp-link.com/fr/support/download/tl-wr840n/v6/#Firmware
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