CVE-2026-48695Patch(pavel-odintsov / fastnetmon)

LOWCVSS 8.1 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch pavel-odintsov fastnetmon systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The _log() function in src/mikrotik_plugin/fastnetmon_mikrotik.php (lines 107-108) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec("echo `date` \"- {FASTNETMON] - " . $msg . " \" >> " . $FILE_LOG_TMP). This is identical in pattern to the Juniper plugin vulnerability. The $msg variable contains unsanitized attack data from command-line arguments. An attacker who can influence argv[] values can inject arbitrary shell commands. The fix is to replace exec() with file_put_contents() or use escapeshellarg().

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-78

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • fastnetmon

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Products
fastnetmon

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-06-03: 1Patch / Workaround · 2026-06-03: 1Technical Details · 2026-06-03: 106-03
Signal classification1 categories
Patch
1100.0%
Referenced assets16 URLs
Full discourse1 post
  • Lorikeet Security@lorikeetsec
    Patch

    16 CVEs in FastNetMon Community Edition. All found, reported, and fixed. Our team ran a full source code audit of FastNetMon CE and surfaced 16 distinct vulnerabilities, now tracked as CVE-2026-48682 through CVE-2026-48697. First, credit where it is due. Huge thanks to Pavel Odintsov and the FastNetMon team. We sent the report and they moved immediately, confirmed the issues, staged fixes, and shipped patches in days. That is exactly how responsible disclosure is supposed to go, and a maintainer who turns it around that fast makes the whole ecosystem safer. The part I am most excited about: we did not find these by hand alone. Much of this audit ran on the same analysis engine we are building into Lory, our autonomous offensive security agent. The pattern that caught most of the worst bugs is simple to describe and brutal in practice, a length value read straight off the wire flowing into a memcpy with no bounds check. Teaching an agent to trace untrusted input from the network boundary to the dangerous sink is exactly what Lory is built to do at scale. FastNetMon was a real-world proving ground, and it delivered. The throughline on the critical ones: wire-controlled length, no validation, into a binary built with zero hardening flags. No stack canary, no FORTIFY, no PIE, no RELRO. That is what turns a parser bug into code execution as root on the box watching your network. If you run FastNetMon CE in production, update now. If you package it yourself, add hardening flags to your build. → All 16, with full technical writeups: Memory corruption CVE-2026-48682 · IPv4 parser OOB read https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48682-ipv4-parser-oob CVE-2026-48683 · NetFlow v9 data flowset OOB https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48683-netflow-v9-data-oob CVE-2026-48684 · NetFlow v9 options template OOB https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48684-netflow-v9-options-oob CVE-2026-48685 · BGP extended length misread https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48685-bgp-extended-length CVE-2026-48686 · BGP NLRI stack overflow (CVSS 9.8, RCE) https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48686-bgp-nlri-stack-overflow CVE-2026-48688 · BGP MP_REACH_NLRI IPv6 https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48688-bgp-mp-reach-nlri-ipv6 CVE-2026-48689 · Dynamic buffer off-by-one https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48689-dynamic-buffer-off-by-one CVE-2026-48690 · Packet storage integer overflow https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48690-packet-storage-integer-overflow CVE-2026-48691 · BGP AS_PATH overflow https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48691-bgp-as-path-overflow Injection CVE-2026-48687 · Juniper plugin command injection https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48687-juniper-cmd-injection CVE-2026-48694 · Juniper NETCONF injection https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48694-juniper-netconf-injection CVE-2026-48695 · MikroTik command injection https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48695-mikrotik-cmd-injection CVE-2026-48696 · ExaBGP sprintf overflow https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48696-exabgp-sprintf-overflow Auth & transport CVE-2026-48692 · Unauthenticated gRPC interface https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48692-grpc-no-auth CVE-2026-48693 · Symlink issue in temp handling https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48693-symlink-tmp CVE-2026-48697 · Missing TLS validation https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48697-missing-tls-validation → Read the C, find the line, prove the impact, disclose it right. #cybersecurity #infosec #vulnerabilityresearch #CVE #networksecurity #BGP #responsibledisclosure #AISecurity

    Post summary

    The post announces 16 newly discovered CVEs in FastNetMon CE, provides links to detailed technical write‑ups, confirms rapid patch release, and urges users to update or harden their builds.

    00041338
    299 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apppavel-odintsovfastnetmon---

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