RCE in Openwrt Luci
CVE-2026-57999
luci-app-tailscale-community contains a command injection vulnerability in the tailscale.do_login RPC method that allows authenticated users to execute arbitrary commands as root. The vulnerability exists because user-controlled loginserver and loginserver_authkey parameters are improperly quoted within a double-quoted shell command, allowing shell substitutions like $() to be evaluated by the outer shell before argument processing.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.023 (82.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Openwrt Luci — versions 0
- Openwrt Luci-App-Tailscale-Community — versions 0
Weakness classification (CWE)
References
- github.com/openwrt/luci/security/advisories/GHSA-xwc5-mx58-rh35 (vendor-advisory)
- www.vulncheck.com/advisories/luci-app-tailscale-community-command-injection-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-57999?
- CVE-2026-57999 is a high-severity vulnerability in Openwrt Luci, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-29.
- How severe is CVE-2026-57999?
- High severity. CVSS v3 base score is 8.8 out of 10.