Cyber Resilience

CVE-2026-70637

Public PoC
Published
06 August 2026
Modified
06 August 2026
CVSS Score v4 8.2
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0023 14th percentile
Risk Priority 33 floored blend · peak EPSS

Summary

CVE-2026-70637 is a high-severity Missing Synchronization (CWE-820) vulnerability. Its CVSS base score is 8.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 14th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability Data

LightFTP through 2.4 contains multiple data race vulnerabilities in ftpserv.c that allow anonymous attackers to cause undefined behavior by issuing LIST followed by ABOR commands without authentication. The control thread closes data_socket and file_fd descriptors while worker threads concurrently operate…

more

on the same fields in worker_thread_cleanup, allowing stale file descriptors to be reassigned by the OS and subsequently used by worker threads on unrelated resources, resulting in potential denial of service.

CWE(s)
CWE-820

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-22163Shared CWE-820
CVE-2025-47154Shared CWE-820
CVE-2025-49751Shared CWE-820
CVE-2025-1445Shared CWE-820
CVE-2024-49114Shared CWE-820
CVE-2026-57029Shared CWE-820
CVE-2025-47999Shared CWE-820
CVE-2026-53153Shared CWE-820
CVE-2026-44318Shared CWE-820
CVE-2026-53277Shared CWE-820

Affected Assets

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require proper concurrency controls and synchronization primitives during design and coding.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing synchronization through concurrency testing.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC practices can mandate concurrency controls and synchronization primitives.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify thread-safety and locking mechanisms.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include proper synchronization for shared resources.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require synchronization primitives to prevent race conditions.

References