Vulnerability · Published Mar 20, 2026 · Assigned by VulDB
CVE-2026-4497Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection
High 7.3
In plain English
A high-severity OS command injection in WA300 from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 82% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)2.2%top 17.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
Affected products (as reported)
Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-352046 | Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection vdb-entry, technical-description
- VDB-352046 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #773875 | Totolink WA300 V5.2cu.7112_B20190227 OS Command Injection third-party-advisory
- https://github.com/hellonestor/killallbug/issues/1 issue-tracking
- https://github.com/user-attachments/files/25790616/Unauthenticated.Remote.Code.Execution.in.TOTOLINK.WA300.via.Command.Injection.in.recvUpgradeNewFw.zip exploit, patch
- https://www.totolink.net/ product