CVE-2026-67607PoC

MEDIUMCVSS 8.2 · HIGH

Exploit discussion active in current signal (2 latest mentions)

Immediate actions

Patch affected systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

LightFTP 2.3.1 contains a residual race condition vulnerability (an incomplete fix for CVE-2024-11144) in the worker_thread_cleanup() function of ftpserv.c that allows remote unauthenticated attackers to destabilize or crash the daemon by triggering unsynchronized access to shared per-connection state without holding the required mutex lock. Attackers can send a data-transfer command such as LIST followed immediately by ABOR to exploit the missing synchronization on shared context and detached thread id reuse, resulting in daemon destabilization or crash which can lead to a denial of service. The 2.3.1 patch only narrowed the timing window (an extra re-check and reordered cleanup), it never added the missing lock, so the underlying race remains.

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4.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-367

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Threat summary

Public PoC and exploit tooling are both present
Patch or workaround signal is available
2 mentions across 1 observed day

What's happening

Exploit tool or code specified in 1 signal
PoC mentioned or linked in 2 signals
Patch or workaround mentioned in 2 signals
Technical details provided in 2 signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

PoC

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Hephaestvs@Vulcanux_91d
PoC
csirt_it: ‼️ #LightFTP: disponibile PoC per lo sfruttamento della CVE-2026-67607 Rischio: 🟠 Tipologia: 🔸 Denial of Service 🔗 https://www.acn.gov.it/portale/en/w/disponibile-poc-per-lo-sfruttamento-della-cve-2026-67607-relativa-al-servizio-lightftp 👉 Mitigazioni disponibili https://t.co/omTeUSSVe7
Post summary
Proof of Concept for CVE‑2026‑67607 is publicly available, indicating a denial‑of‑service flaw in LightFTP, with mitigations linked; no evidence of active exploitation or false positives is provided.
0000046
629 followersView on X
Hephaestvs@Vulcanux_91d
PoC
csirt_it: ‼️ #LightFTP: disponibile PoC per lo sfruttamento della CVE-2026-67607 Rischio: 🔴 Tipologia: 🔸 Denial of Service 🔗 https://www.acn.gov.it/portale/en/w/disponibile-poc-per-lo-sfruttamento-della-cve-2026-67607-relativa-al-servizio-lightftp 👉 Mitigazioni disponibili https://x.com/csirt_it/status/2084941609116876907/photo/1
Post summary
A PoC for CVE-2026-67607, a Denial of Service vulnerability in LightFTP, has been released along with suggested mitigations.
0000038
629 followersView on X

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