What is the CVSS score of CVE-2025-45841?

CVE-2025-45841 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of Nr1800x Firmware are affected by CVE-2025-45841?

Organizations using TOTOLINK NR1800X V9.1.0u.6681_B20230703 face critical risk from CVE-2025-45841, a out-of-bounds write vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-45841?

Yes, a public proof-of-concept exploit is available for CVE-2025-45841. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2025-45841?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Nr1800x Firmware CVE-2025-45841

CRITICAL

Out-of-bounds Write (CWE-787)

2025-05-08 cve@mitre.org

Memory Corruption Buffer Overflow Nr1800x Firmware TOTOLINK

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:40 vuln.today

PoC Detected

May 16, 2025 - 15:39 vuln.today

Public exploit code

CVE Published

May 08, 2025 - 16:15 nvd

CRITICAL 9.8

DescriptionCVE.org

TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the text parameter in the setSmsCfg function.

AnalysisAI

TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the text parameter in the setSmsCfg function. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the text parameter in the setSmsCfg function. Affected products include: Totolink Nr1800X Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

CVE-2025-45841 vulnerability details – vuln.today

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Nr1800x Firmware CVE-2025-45841

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code