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Tm C3500 Firmware CVE-2023-27520

MEDIUM
Cross-Site Request Forgery (CSRF) (CWE-352)
2023-04-11 vultures@jpcert.or.jp
CSRF Tm C3500 Firmware Tm C7500 Firmware Lp 9200Ps2 Firmware Lp 9200Ps3 Firmware Lp 8200C Firmware Lp 9600 Firmware Lp 9600S Firmware Lp 9300 Firmware Lp 8500C Firmware Lp 8700Ps3 Firmware Lp 9800C Firmware Lp S5500 Firmware Lp 9200B Firmware Lp 9200C Firmware Lp S4500 Firmware Lp S6500 Firmware Lp S7000 Firmware Lp S5000 Firmware Lp S4000 Firmware Lp S6000 Firmware Lp S5300 Firmware Lp S5300R Firmware Lp S300N Firmware Lp S310N Firmware Lp S3000 Firmware Lp S3000R Firmware Lp S3000Z Firmware Lp S3000Ps Firmware Lp S7500 Firmware Lp S7500Ps Firmware Lp S3500 Firmware Lp S4200 Firmware Lp S9000 Firmware Lp S7100 Firmware Lp S8100 Firmware Prifnw1 Firmware Prifnw1S Firmware Prifnw2 Firmware Prifnw2Ac Firmware Prifnw2S Firmware Prifnw2Sac Firmware Prifnw3 Firmware Prifnw3S Firmware Prifnw6 Firmware Prifnw7 Firmware Prifnw7U Firmware Prifnw7S Firmware Pa W11G Firmware Pa W11G2 Firmware Esnsb1 Firmware Esnsb2 Firmware Esifnw1 Firmware Sc T3250 Firmware Sc T3255 Firmware Sc T5250 Firmware Sc T5255 Firmware Sc T7250 Firmware Sc T7255 Firmware Sc T5250D Firmware Sc T5255D Firmware Sc T7250D Firmware Sc T7255D Firmware Sc P5050 Firmware Sc P7050 Firmware Sc P9050 Firmware Sc P6050 Firmware Sc P8050 Firmware Sc P20050 Firmware Sc S80650 Firmware Sc S60650 Firmware Sc S40650 Firmware Sc S60650L Firmware Sc S80650L Firmware Sc F7200 Firmware Sc F6350 Firmware Sc F9450 Firmware Sc F9450H Firmware Sc F2150 Firmware Tm C3400 Firmware Px B510 Firmware Px B500 Firmware Px 5800 Firmware Px 5002 Firmware Px 5V Firmware Px 7V Firmware Sc Px7V2 Firmware Sc Px5V2 Firmware Sc Px3V Firmware Px 6250S Firmware Px 6550 Firmware Px 7500N Firmware Px 7550 Firmware Px 7550S Firmware Px 9500N Firmware Px 9550 Firmware Px 9550S Firmware Px 20000 Firmware Stylus Pro Gs6000 Firmware Px W8000 Firmware Px F8000 Firmware Px F8000M Firmware Px F10000 Firmware Px H6000 Firmware Px H7000 Firmware Px H8000 Firmware Px H9000 Firmware Px H10000 Firmware Sc T3050 Firmware Sc T5050 Firmware Sc T7050 Firmware Sc P10050 Firmware Sc S30650 Firmware Sc S50650 Firmware Sc S70650 Firmware Sc F6000 Firmware Sc F7100 Firmware Sc F6200 Firmware Sc F9200 Firmware Sc F9350 Firmware Sc F2000 Firmware Epson
6.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Anti-CSRF tokens, SameSite cookies
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

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

Impact

CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.

Exploit ScenarioDerived

A remote attacker could trick authenticated users into performing unintended actions by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

Cross-site request forgery (CSRF) vulnerability in SEIKO EPSON printers/network interface Web Config allows a remote unauthenticated attacker to hijack the authentication and perform unintended. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement anti-CSRF tokens, validate Origin/Referer headers, use SameSite cookie attribute.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352), which allows attackers to trick authenticated users into performing unintended actions. Cross-site request forgery (CSRF) vulnerability in SEIKO EPSON printers/network interface Web Config allows a remote unauthenticated attacker to hijack the authentication and perform unintended operations by having a logged-in user view a malicious page. [Note] Web Config is the software that allows users to check the status and change the settings of SEIKO EPSON printers/network interface via a web browser. According to SEIKO EPSON CORPORATION, it is also called as Remote Manager in some products. Web Config is pre-installed in some printers/network interface provided by SEIKO EPSON CORPORATION. For the details of the affected product names/model numbers, refer to the information provided by the vendor. Affected products include: Epson Lp-9200Ps2 Firmware, Epson Lp-9200Ps3 Firmware, Epson Lp-8200C Firmware, Epson Lp-9600 Firmware, Epson Lp-9600S Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

DescriptionNVD

Cross-site request forgery (CSRF) vulnerability in SEIKO EPSON printers/network interface Web Config allows a remote unauthenticated attacker to hijack the authentication and perform unintended operations by having a logged-in user view a malicious page. [Note] Web Config is the software that allows users to check the status and change the settings of SEIKO EPSON printers/network interface via a web browser. According to SEIKO EPSON CORPORATION, it is also called as Remote Manager in some products. Web Config is pre-installed in some printers/network interface provided by SEIKO EPSON CORPORATION. For the details of the affected product names/model numbers, refer to the information provided by the vendor.

Threat Intelligence Overview

EPSS Score
0.3%
Top 77% exploitable
Data Quality
2 sources
Confidence: Low

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.

Affected Products (CPE)NVD

cpe:2.3:o:epson:lp-9200ps2_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9200ps3_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-8200c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9600_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9600s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9300_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-8500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-8700ps3_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9800c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s5500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9200b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-9200c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s4500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s6500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s7000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s5000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s4000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s6000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s5300_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:epson:lp-s5300r_firmware:-:*:*:*:*:*:*:*
+ 100 more

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