Vulnerability details
CVE-2026-123957
Totolink CA300-PoE
TOTOLINK CA300-PoE cstecgi.cgi setIpQosRules buffer overflow
CVSS 4.0
9.4Critical
Official description
A vulnerability was determined in TOTOLINK CA300-PoE 6.2c.884. Impacted is the function setIpQosRules of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ipStart causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.4Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P |
| 9.9Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C |
| 9.9Critical | 3.0 | CVEProject cvelistV5 (CNA) (VulDB) | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C |
| 9.0High | 2.0 | CVEProject cvelistV5 (CNA) (VulDB) | AV:N/AC:L/Au:S/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/432020 vdb-entrytechnical-description
- https://vuldb.com/vuln/432020/cti signaturepermissions-required
- https://vuldb.com/cve/CVE-2026-123957 third-party-advisory
- https://vuldb.com/submit/1033672 third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setIpQosRules-3f953a41781f801195e5e07dfe7488b9?source=copy_link exploit
- https://www.totolink.net/ product
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Details
- Published
- 2026-11-07
- Last updated
- 2026-11-09
- State
- Published
- Assigner (CNA)
- VulDB
- Kolun priority
- 34 · Low
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-120Buffer Overflow
- CWE-119Memory Corruption