What is the CVSS score of CVE-2025-5853?

CVE-2025-5853 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Is there a public PoC exploit available for CVE-2025-5853?

Yes, a public proof-of-concept exploit is available for CVE-2025-5853. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-5853?

Within 24 hours: Inventory all Tenda AC6 15.03.05.16 devices in your environment and isolate affected units from critical network segments if operationally feasible. Within 7 days: Implement network segmentation to restrict access to the vulnerable /goform/SetRemoteWebCfg endpoint and disable remote web management features if not essential. Within 30 days: Replace affected Tenda AC6 units with alternative vendors or firmware versions once patched, and conduct network forensics to detect unauthorized access attempts during the vulnerability window.

Ac6 Firmware CVE-2025-5853

EUVD-2025-17419 HIGH

Buffer Overflow (CWE-119)

2025-06-09 cna@vuldb.com

Buffer Overflow Tenda Ac6 Firmware

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-119 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 8.8. EPSS 0.3%. Public PoC/exploit available. No patch confirmed.
Exploit ScenarioDerived	An attacker could exploit this vulnerability in A vulnerability classified as critical to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.3% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 14, 2026

A buffer overflow vulnerability in A vulnerability classified as critical (CVSS 8.8). Risk factors: public PoC available.

Earlier versions of this analysis (1)

v1 Mar 14, 2026 - 19:21 CVSS 8.8

A vulnerability classified as critical was found in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formSetSafeWanWebMan of the file /goform/SetRemoteWebCfg. The manipulation of

RemediationAI

Monitor vendor channels for patch availability. Consider network segmentation to limit exposure if patching is delayed.

Affected VersionsENISA

AC6 15.03.05.16

Affected Packages

euvd ac6 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-119 (Buffer Overflow). CVSS 8.8 indicates high severity. Affects A vulnerability classified as critical.

Know when Ac6 Firmware gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Jun 09, 2025 - 19:04 vuln.today

Public exploit code

CVE Published

Jun 09, 2025 - 01:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability classified as critical was found in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formSetSafeWanWebMan of the file /goform/SetRemoteWebCfg. The manipulation of the argument remoteIp leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Executive ViewAI

Why It Matters

A critical remote code execution vulnerability affecting Tenda AC6 routers (model 15.03.05.16) allows unauthenticated attackers to execute arbitrary code through a stack buffer overflow. Organizations using this device model face immediate risk of network compromise, data exfiltration, and lateral movement into connected systems, particularly concerning for businesses relying on these devices for network perimeter security.

Business Impact: High

Compensating Controls

Disable remote web management and SSH access on affected devices; implement strict network access controls (firewall rules) to block external access to the vulnerable endpoint (/goform/SetRemoteWebCfg); deploy WAF rules to block requests containing suspicious remoteIp parameters; segment affected devices onto isolated VLANs with limited trust; monitor for CVE-2025-5853 exploitation attempts in network logs; consider temporary device shutdown if replacement is imminent; monitor Tenda security advisories for emergency patches.

Threat Intelligence Overview

EPSS Score

0.3%

Top 45% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.3%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.