Event Monitor Cyber
EM-20261107-5MB5 VulnerabilityHigh severity

TOTOLINK CA300-PoE Vulnerability (CVE-2026-123957)

CVE-2026-123957

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Status
Developing

Since : signals keep joining.

First Signal
Nov 07 09:17 UTCC6 NVD CVE API 2.0
Page Born
Nov 07 09:30 UTCsecond source joined
Last Signal
Nov 07 09:30 UTC17 hours before snapshot
Sources
20 official · 2 research, news or crowd
Open For
1 hoursso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 07 09:17 UTC
    C6 NVD published
  2. Scored: reached
    Nov 07 09:17 UTC
    CVSS 8.6
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: not yet
    Not yet
    None in sources yet
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

04:0006:0008:0010:00BornC6 NVD CVE API 2.0C29 CIRCL Vulnerability-Lookup

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. GHSA-wxh7-x4wq-j3rp / CVE-2026-123957 (opens source in a new tab) 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… Med severityDatabaseC29 CIRCL Vulnerability-Lookup
  2. CVE-2026-123957 (CVSS 8.6) (opens source in a new tab) 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… High severityDatabaseC6 NVD CVE API 2.0