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CVE-2026-48683

FastNetMon Community Edition through 1.2.9 contains an out-of-bounds read vulnerability in the NetFlow v9 data flowset processor. In src/netflow_plugin/netflow_v9_collector.cpp, the Data template branch (lines 1695-1702) iterates over flow records without performing a per-iteration bounds check against the packet end pointer. In contrast, the Options template branch (lines 1709-1719) correctly checks 'if (pkt + offset + field_template->total_length > packet_end)' before each iteration. The Data
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:444d56705edf583daf1444a080ae4eace842f1c2736229c2d6ce50d685d3ff8f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://github.com/pavel-odintsov/fastnetmon"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/references/0
{"url":"https://github.com/pavel-odintsov/fastnetmon/blob/master/src/netflow_plugin/netflow_v9_collector.cpp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/references/1
{"url":"https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48683-netflow-v9-data-oob"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:095b787baf562f78a37766f528d82ba03829036052f932e020a489e6a1a62063 · sha256:c1a46670dc289b0f… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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