TOTOLINK CA300-PoE cstecgi.cgi setWiFiBasicConfig buffer overflow
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 17/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The TOTOLINK CA300-PoE contains a buffer overflow in the setWiFiBasicConfig function of its /cgi-bin/cstecgi.cgi file, triggered by an oversized KeyStr argument. An attacker can reach it remotely over the network with low-privilege login, and the flaw carries high impact to confidentiality, integrity, and availability.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
A security vulnerability has been detected in TOTOLINK CA300-PoE 6.2c.884. This impacts the function setWiFiBasicConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument KeyStr leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure3/25Reachable over the network · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity9.4/10CVSS 9.4
- No patch5/5No patch listed yet
What would change the score
- Would score about 72 if added to CISA KEV
- Would score about 67 if CISA's SSVC rates exploitation active
- Would score about 36 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- TOTOLINK CA300-PoE
6.2c.884
Evidence 6
- Advisory
- Advisory
- Advisory
- Advisory
- Exploit
- Link
Corrections
None so far.
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Questions about CVE-2026-123961
Is CVE-2026-123961 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-123961?
CA300-PoE: version 6.2c.884.Source: cve.now feed data