Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-48691

FastNetMon Community Edition through 1.2.9 contains an integer overflow in the BGP AS_PATH attribute encoder. In src/bgp_protocol.hpp, the IPv4UnicastAnnounce::get_attributes() function computes attribute_length as 'sizeof(bgp_as_path_segment_element_t) + this->as_path_asns.size() * sizeof(uint32_t)' and stores it in a uint8_t field (line 600-605). Since uint8_t can only hold values 0-255, an AS_PATH containing more than 63 ASNs (2 + 64*4 = 258 > 255) causes silent truncation. The truncated leng
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d59dc21e0adf01bf87c8c81e4ba99015478e290c4fb02c202c7b8dc9e9227894
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/adp/0/problemTypes/0/descriptions/0

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/adp/0/problemTypes/1/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:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/adp/0/problemTypes/1/descriptions/0

Source references

3 source assertions
{"url":"https://github.com/pavel-odintsov/fastnetmon"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/cna/references/0
{"url":"https://github.com/pavel-odintsov/fastnetmon/blob/master/src/bgp_protocol.hpp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /containers/cna/references/1
{"url":"https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48691-bgp-as-path-overflow"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efcfbd6bc3a755024aceee14b021c001886925c2790cab9098822e1d6654c2a3 · sha256:02a9f033b757ae95… · /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.

← Back to CVE Explorer