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NVD / CVE Program· CNA mitre

CVE-2021-45428: TLR-2005KSH is affected by an incorrect access control vulnerability.

CriticalCVSS 9.8 · v3.1—Proof of concept No fix recorded

Noroxi assessment

Priority: Plan (action score 56/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 56.9% (FIRST EPSS); higher than 99% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

TLR-2005KSH is affected by an incorrect access control vulnerability. THe PUT method is enabled so an attacker can upload arbitrary files including HTML and CGI formats.

Published
Jan 3, 2022
Updated
Jun 17, 2026
EPSS
56.9% · 99th percentile

Report tools

JSON

Action score

56

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
17 / 30 · 56.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-45428

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
telesquaretlr-2005ksh firmware
telesquaretlr-2005ksh

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • telesquare tlr-2005ksh firmwareall versions

Same product

telesquare: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-46424Telesquare TLR-2005KSH 1.0.0 is affected by an arbitrary file deletion vulnerability that allows a remote attacker to delete any file, even…
    47Plan
  • CVE-2025-26011Telesquare TLR-2005KSH 1.1.4 has an unauthorized stack overflow vulnerability when requesting the admin.cgi parameter with…
    39Monitor
  • CVE-2025-26010Telesquare TLR-2005KSH 1.1.4 allows unauthorized password modification when requesting the admin.cgi parameter with setUserNamePassword.
    39Monitor

Published before and after this one in the same product

  • Later →CVE-2021-46423Apr 27, 2022 · Telesquare TLR-2005KSH 1.0.0 is affected by an unauthenticated file download vulnerability that allows a remote attacker to download a full…
    21Monitor
  • Later →CVE-2024-29269Apr 10, 2024 · An issue discovered in Telesquare TLR-2005Ksh 1.0.0 and 1.1.4 allows attackers to run arbitrary system commands via the Cmd parameter.
    37Monitor
  • Later →CVE-2025-26001Mar 26, 2025 · Telesquare TLR-2005KSH 1.1.4 is vulnerable to Information Disclosure via the parameter getUserNamePassword.
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2022-05-11
Nuclei detection templateNuclei template CVE-2021-45428 —
Proof-of-concept repository on GitHubstars:02024-07-29

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+128 d
  3. TodayNov 14, 2026+1776 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-639 · Authorization Bypass Through User-Controlled Key

CVSS vector

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

nvd-primary

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

The bug in code

The whole CWE-639 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const invoice = await Invoice.findById(req.params.id);res.json(invoice);

Fixed

ts
const invoice = await Invoice.findOne({  id: req.params.id,  ownerId: req.user.id,});if (!invoice) return res.sendStatus(404);res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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