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Tl Wr841n Firmware CVE-2023-33538

HIGH
Command Injection (CWE-77)
2023-06-07 cve@mitre.org
Command Injection TP-Link Tl Wr841n Firmware Tl Wr940n Firmware Tl Wr740N Firmware
8.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-77
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Command injection prevention
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived

A remote attacker could inject arbitrary commands into system command execution by sending crafted requests to the affected application.
This Week Schedule remediation this week. Why: HIGH severity + EPSS > 10%.
Exploited in the wild (CISA KEV) No patch listed yet 41.9% exploitation probability (EPSS)

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AnalysisAI

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm . Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use parameterized APIs, avoid shell execution, validate input with strict allowlists.

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Technical ContextAI · show details

This vulnerability is classified as Command Injection (CWE-77), which allows attackers to inject arbitrary commands into system command execution. TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm . Affected products include: Tp-Link Tl-Wr940N Firmware, Tp-Link Tl-Wr841N Firmware, Tp-Link Tl-Wr740N Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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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

2
Added to CISA KEV
Jul 14, 2026 - 04:22 CISA
CVE Published
Jun 07, 2023 - 04:15 nvd
HIGH 8.8

DescriptionNVD

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm .

Threat Intelligence Overview

EPSS Score
41.9%
Top 1% exploitable
Exploit
POC
Public exploit code exists
Data Quality
3 sources
Confidence: Low
NVD CVE.org CISA KEV EPSS GitHub

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 Yes
Public POC Yes
EPSS 41.9%
Patch available No
Active threat Yes
Deciding rule
HIGH severity + EPSS > 10%
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
Out-of-Cycle
Exploitation· derived
Active
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
High

Priority Score

156
Low Medium High Critical
KEV: +50
EPSS: +42
CVSS: +44
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Affected Products (CPE)NVD

cpe:2.3:o:tp-link:tl-wr940n_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr841n_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr740n_firmware:-:*:*:*:*:*:*:*

More in Tl Wr841n Firmware

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CVE-2012-5687 HIGH POC
7.8 Nov 01

Directory traversal vulnerability in the web-based management feature on the TP-LINK TL-WR841N router with firmware 3.13
CVE-2025-9377 HIGH
8.6 Aug 29

TP-Link Archer C7 and TL-WR841N routers contain an authenticated remote command execution vulnerability in the Parental

CVE-2023-50224 MEDIUM
6.5 May 03

TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability.
CVE-2022-25073 CRITICAL POC
9.8 Feb 24

TL-WR841Nv14_US_0.9.1_4.18 routers were discovered to contain a stack overflow in the function dm_fillObjByStr(). Rated

CVE-2018-11714 CRITICAL POC
9.8 Jun 04

An issue was discovered on TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608 Rel.58696n and TL-WR841N v13 00
CVE-2023-33537 HIGH POC
8.1 Jun 07

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a buffer overflow via the compo
CVE-2023-33536 HIGH POC
8.1 Jun 07

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a buffer overflow via the compo
CVE-2023-36358 HIGH POC
7.7 Jun 22

TP-Link TL-WR940N V2/V3/V4, TL-WR941ND V5/V6, TL-WR743ND V1 and TL-WR841N V8 were discovered to contain a buffer overflo
CVE-2023-36357 HIGH POC
7.7 Jun 22

An issue in the /userRpm/LocalManageControlRpm component of TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8/V10, and TL-WR941ND
CVE-2023-36356 HIGH POC
7.7 Jun 22

TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were discovered to contain a buffer read ou
CVE-2023-36359 HIGH POC
7.5 Jun 22

TP-Link TL-WR940N V4, TL-WR841N V8/V10, TL-WR940N V2/V3 and TL-WR941ND V5/V6 were discovered to contain a buffer overflo
CVE-2023-36354 HIGH POC
7.5 Jun 22

TP-Link TL-WR940N V4, TL-WR841N V8/V10, TL-WR740N V1/V2, TL-WR940N V2/V3, and TL-WR941ND V5/V6 were discovered to contai

Same weakness CWE-77 – Command Injection

View all
CVE-2024-21887 CRITICAL POC
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CVE-2016-3081 HIGH POC
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CVE-2012-1823 CRITICAL POC
9.8
CVE-2016-1555 CRITICAL POC
9.8
CVE-2024-55956 CRITICAL POC
9.8
CVE-2015-2051 HIGH POC
8.8
CVE-2017-6327 HIGH POC
8.8
CVE-2023-34960 CRITICAL POC
9.8

Same technique Command Injection

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CVE-2019-15107 CRITICAL POC
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CVE-2024-51378 CRITICAL POC
9.8
CVE-2014-6271 CRITICAL POC
9.8

References

Advisories & patches
REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-33538 REF https://www.secpod.com/blog/cisa-issues-warning-on-active-exploitation-of-tp-link-vulnerability-cve-2023-33538/ REF https://www.tp-link.com/us/support/faq/3562/

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