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CVE-2026-48688

7.5 HIGH

FastNetMon Community Edition through 1.2.9 contains multiple out-of-bounds reads in the BGP MP_REACH_NLRI IPv6 attribute decoder

Published: 2026-05-26 · Last updated: 2026-05-27

Severity and scoring

CVSS
7.5 HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-125

Affected products

VendorProduct
pavel-odintsovfastnetmon

Description

FastNetMon Community Edition through 1.2.9 contains multiple out-of-bounds reads in the BGP MP_REACH_NLRI IPv6 attribute decoder. The function decode_mp_reach_ipv6() in src/bgp_protocol.cpp contains a TODO comment at line 156 explicitly acknowledging 'we should add sanity checks to avoid reads after attribute memory block.' The function casts raw pointers to structure types without verifying sufficient data exists (line 158), uses the attacker-controlled length_of_next_hop field to determine memcpy size (line 181), and computes prefix_length by dereferencing a pointer calculated from multiple attacker-controlled offsets without bounds validation (line 189). The prefix_length is then used to calculate number_of_bytes_required_for_prefix which becomes a memcpy length (line 202) with no check against remaining buffer size.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-48689 — FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamic_binary_buffer_t class (src/dy... (9.8 CRITICAL)
  • CVE-2026-48696 — FastNetMon Community Edition through 1.2.9 has a buffer overflow, a different vulnerability than CVE-2026-48686 and CVE-2026-48689 (6.2 MEDIUM)
  • CVE-2026-48695 — FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin (8.1 HIGH)
  • CVE-2026-48694 — FastNetMon Community Edition through 1.2.9 contains a configuration injection vulnerability in the Juniper router integration plugin (8.1 HIGH)
  • CVE-2026-48697 — FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections (7.4 HIGH)

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