What is CVE-2026-7721?

CVE-2026-7721 is a medium-severity vulnerability in Totolink Wa300, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-05-04.

How severe is CVE-2026-7721?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Totolink Wa300

CVE-2026-7721

A security vulnerability has been detected in Totolink WA300 5.2cu.7112_B20190227. This affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument hostTime leads to command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.

Published 2026-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.018 (77.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.018 · change: +0.009

Affected products

Totolink Wa300 — versions 5.2cu.7112_B20190227

Weakness classification (CWE)

References

vuldb.com/vuln/360897 (technical-description, vdb-entry)
vuldb.com/vuln/360897/cti (signature, permissions-required)
vuldb.com/submit/807199 (third-party-advisory)
lavender-bicycle-a5a.notion.site/TOTOLINK-WA300-NTPSyncWithHost-34553a41781f808… (exploit)
www.totolink.net/ (product)

Frequently asked questions

What is CVE-2026-7721?: CVE-2026-7721 is a medium-severity vulnerability in Totolink Wa300, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-05-04.
How severe is CVE-2026-7721?: Medium severity. CVSS v3 base score is 6.3 out of 10.