RCE in TP-Link Tl-Wr840n
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) 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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.098 (95.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 96th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.097 · newest: 0.098 · change: +0.001
Affected products
- TP-Link Tl-Wr840n
- TP-Link Tl-Wr840n Firmware — versions 6_eu_0.9.1_4.16
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.tp-link.com/fr/support/download/tl-wr840n/v6/ (Vendor Advisory)
- therealunicornsecurity.github.io/TPLink/ (Exploit, Third Party Advisory)
- github.com/therealunicornsecurity/therealunicornsecurity.github.io/blob/master/… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36178?
- CVE-2020-36178 is a critical-severity vulnerability in TP-Link Tl-Wr840n, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-01-06.
- How severe is CVE-2020-36178?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-36178 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.