Vulnerability details
CVE-2026-123959
Totolink CA300-PoE
TOTOLINK CA300-PoE cstecgi.cgi setLanguageCfg buffer overflow
CVSS 4.0
9.4Critical
Official description
A security flaw has been discovered in TOTOLINK CA300-PoE 6.2c.884. The impacted element is the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument langType results in buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.4Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P |
| 9.1Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C |
| 9.1Critical | 3.0 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C |
| 8.3High | 2.0 | CVEProject cvelistV5 (CNA) (VulDB) | AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Totolink | CA300-PoE | 6.2c.884 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://vuldb.com/vuln/432022 vdb-entrytechnical-description
- https://vuldb.com/vuln/432022/cti signaturepermissions-required
- https://vuldb.com/cve/CVE-2026-123959 third-party-advisory
- https://vuldb.com/submit/1033721 third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setLanguageCfg-3f953a41781f80199f44f227136a1441?source=copy_link exploit
- https://www.totolink.net/ broken-linkproduct
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Details
- Published
- 2026-11-07
- Last updated
- 2026-11-10
- State
- Published
- Assigner (CNA)
- VulDB
- Kolun priority
- 39 · Medium
Exploit prediction (EPSS)
0.84%
Probability of exploitation in 30 days
58.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-120Buffer Overflow
- CWE-119Memory Corruption