Cyber Resilience

CVE-2025-34319

CriticalPublic PoCRCE

Published: 03 December 2025

Published
03 December 2025
Modified
15 April 2026
KEV Added
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Patch
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CVSS Score v4 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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 0.0191 83.7th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-34319 is a critical-severity OS Command Injection (CWE-78) vulnerability in Totolink (inferred from references). Its CVSS base score is 9.3 (Critical).

Operationally, ranked in the top 16.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

TOTOLINK N300RT wireless router firmware versions prior to V3.4.0-B20250430 contain an OS command injection vulnerability in the Boa formWsc handling functionality. The issue, discovered in version V2.1.8-B20201030.1539 and tracked as CWE-78, allows command execution through the targetAPSsid request parameter.

An unauthenticated attacker can exploit the flaw by sending specially crafted HTTP requests over the network, achieving arbitrary command execution with full impact on confidentiality, integrity, and availability as reflected in the CVSS 9.3 score.

Vendor advisories direct users to the TOTOLINK support site and firmware download page for the N300RT, where the patched release V3.4.0-B20250430 is available; the VulnCheck advisory further highlights the need to apply this update promptly.

EPSS for the CVE rose from a low baseline to a peak of 0.0343 before settling at the current value of 0.0191, indicating emerging exploitation interest after disclosure.

EU & UK References

Vulnerability details

TOTOLINK N300RT wireless router firmware versions prior to V3.4.0-B20250430 (discovered in V2.1.8-B20201030.1539) contain an OS command injection vulnerability in the Boa formWsc handling functionality. An unauthenticated attacker can send specially crafted requests to trigger command execution via the targetAPSsid request…

more

parameter.

CWE(s)
CWE-78

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Totolink
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References