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CVE-2026-48693

FastNetMon Community Edition through 1.2.9 is vulnerable to a local symlink attack via predictable file paths in /tmp. The statistics file path defaults to '/tmp/fastnetmon.dat' (src/fastnetmon.cpp line 159). The print_screen_contents_into_file() function (src/fastnetmon_logic.cpp line 2186) opens this path with std::ios::trunc without checking for symlinks or using O_NOFOLLOW. Additionally, the chmod() call on line 2190 always operates on cli_stats_file_path regardless of which file_path parame
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8721a134d38cc13cdad0d8303f4f492932553d9e53bed851ad45c0095319e661
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

{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/adp/0/problemTypes/0/descriptions/0

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/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:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://github.com/pavel-odintsov/fastnetmon"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/references/0
{"url":"https://github.com/pavel-odintsov/fastnetmon/blob/master/src/fastnetmon.cpp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/references/1
{"url":"https://github.com/pavel-odintsov/fastnetmon/blob/master/src/fastnetmon_logic.cpp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/references/2
{"url":"https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48693-symlink-tmp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:eb99ae49f237397e113d2195ce05e06f6edc9dfbfc9508c3f0e0652eddfdb4d3 · sha256:85c029d801b63de2… · /containers/cna/references/3

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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