Cyber Resilience

CVE-2025-26002

Memory Safety in Telesquare Tlr-2005Ksh Firmware 1.1.4

Memory Safety
Published
26 March 2025
Modified
01 April 2025
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0046 38th percentile
Risk Priority 72 floored blend · peak EPSS

Summary

CVE-2025-26002 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Telesquare Tlr-2005Ksh Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 38th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2025-26002 is an unauthorized stack overflow vulnerability (CWE-120) affecting Telesquare TLR-2005KSH version 1.1.4. The issue arises when processing requests to the admin.cgi parameter with the setSyncTimeHost argument, allowing buffer overflow conditions without authentication. It has a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its potential for complete system compromise.

A remote unauthenticated attacker can exploit this vulnerability over the network with low complexity and no user interaction required. By sending a specially crafted request to the vulnerable admin.cgi endpoint, the attacker triggers the stack overflow, potentially achieving arbitrary code execution with high impacts on confidentiality, integrity, and availability.

Further technical details and analysis are provided in the referenced GitHub repositories, including https://github.com/Fan-24/Digging/blob/main/3/1.md and https://github.com/Fan-24/Digging/tree/main/2. No specific patch or mitigation guidance is detailed in the CVE publication.

EU & UK References

Vulnerability Data

Telesquare TLR-2005KSH 1.1.4 is affected by an unauthorized stack overflow vulnerability when requesting the admin.cgi parameter with setSyncTimeHost.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-26004Same product: Telesquare Tlr-2005Ksh
CVE-2025-26006Same product: Telesquare Tlr-2005Ksh
CVE-2025-26005Same product: Telesquare Tlr-2005Ksh
CVE-2025-26008Same product: Telesquare Tlr-2005Ksh
CVE-2025-28361Same product: Telesquare Tlr-2005Ksh
CVE-2025-26011Same product: Telesquare Tlr-2005Ksh
CVE-2025-26007Same product: Telesquare Tlr-2005Ksh
CVE-2025-9603Same product: Telesquare Tlr-2005Ksh
CVE-2024-29269Same product: Telesquare Tlr-2005Ksh
CVE-2021-45428Same product: Telesquare Tlr-2005Ksh

Affected Assets

telesquare
tlr-2005ksh firmware
1.1.4

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
prevents

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.

References