VulnSocial

CVE-2026-6685Disclosure

LOW

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft
  • Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority following a notification that the vulnerability determination was made in error. After review, the CNA confirmed the erroneous finding. Thanks to David Brown for reaching out about this issue.

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1.5/ 10 priority

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Threat summary

  • Public PoC is present in monitored signal
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • PoC mentioned or linked in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-07-04); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-07-04: 1Mentions · 2026-07-06: 1PoC Mentioned / Linked · 2026-07-04: 1Technical Details · 2026-07-04: 107-0407-06
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Classification over time
DateTotalLabels
2026-07-041
Disclosure1
2026-07-061
General1
Full discourse2 posts
  • Rıdvan Yağlı@ridvanyagli
    Disclosure

    🚨 Siber güvenlik şirketi runZero tarafından, yaygın olarak kullanılan FatFs dosya sistemi kütüphanesinde 7 güvenlik açığı tespit edildi. Güvenlik kameraları, IoT cihazları, dronlar ve birçok gömülü sistem potansiyel olarak etkilenebilir. En kritik açık CVE-2026-6682 (CVSS 7.6), özel hazırlanmış FAT32/exFAT medya üzerinden bellek bozulmasına (memory corruption) ve bazı senaryolarda uzaktan kod çalıştırmaya (RCE) yol açabiliyor. Tespit edilen CVE'ler: • CVE-2026-6682 – Integer overflow → Memory corruption / RCE • CVE-2026-6683 – exFAT divide-by-zero (DoS) • CVE-2026-6684 – Bozuk GPT partition tablosu ile DoS • CVE-2026-6685 – Cache hesaplama hatası, veri bozulması • CVE-2026-6686 – Bilgi sızıntısı • CVE-2026-6687 – exFAT volume label buffer overflow • CVE-2026-6688 – Long File Name (LFN) buffer overflow Şu ana kadar aktif istismar raporlanmadı. Ancak PoC'ler genele açık durumda. FAT/FAT32/exFAT kullanan gömülü sistem geliştiren üreticilerin FatFs entegrasyonlarını gözden geçirerek gerekli güvenlik güncellemelerini yayınlaması önem taşıyor.

    Post summary

    RunZero has announced seven CVEs in the FatFs library, detailing their technical characteristics and noting that PoCs are publicly available, yet no active exploitation has been reported, prompting vendors to issue updates.

    01072828
    2.2K followersView on X
  • Philips_NE555@Philips_NE555
    General

    CVE-2026-6685 CVE-2026-6683 I couldn't find the condition to trigger these bugs but it might lead the system crash.

    Post summary

    The note lists two CVEs and expresses uncertainty about triggering them, but provides no technical, exploit, or patch information.

    10000114
    2.4K followersView on X

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