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CVE-2025-64987· NVD / CVE Program· CNA TV

Command Injection in 1E-Explorer-TachyonCore-CheckSimpleIoC Instruction

A command injection vulnerability was discovered in TeamViewer DEX (former 1E DEX), specifically within the 1E-Explorer-TachyonCore-CheckSimpleIoC instruction. Improper input validation, allowing authenticated attackers with Actioner privileges to inject arbitrary commands. Exploitation enables remote execution of elevated commands on devices connected to the platform.

HighCVSS 7.2 · v3.1—No exploit No fix recorded

Noroxi analysis

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Published
Dec 11, 2025
Updated
Jun 17, 2026
EPSS
1.2% · 66th percentile
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Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · TV
7.2
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
teamviewerdigital employee experience

Affected versions

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

  • teamviewer digital employee experiencebefore 21.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (TV). Independent of NVD's CPE analysis and usually ahead of it.

  • TeamViewer DEX

    • up to and including 21affected

Same product

teamviewer: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-44016File Hash Validation Bypass in NomadBranch.exe
    35Monitor
  • CVE-2026-23568Out-of-bounds read vulnerability in Content Distribution Service
    32Monitor
  • CVE-2026-23569Out-of-bounds read vulnerability in Content Distribution Service
    30Monitor
  • CVE-2026-23563Privilege escalation in TeamViewer DEX via DeleteFileByPath instruction
    28Monitor
  • CVE-2025-64993Command Injection in 1E-ConfigMgrConsoleExtensions Instructions
    28Monitor
  • CVE-2025-64992Command Injection in 1E-Nomad-PauseNomadJobQueue Instruction
    28Monitor

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

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-440160 days apartFile Hash Validation Bypass in NomadBranch.exe
    35Monitor
  • CVE-2025-649860 days apartCommand Injection in 1E-Explorer-TachyonCore-DevicesListeningOnAPort Instruction
    28Monitor
  • CVE-2025-649880 days apartCommand Injection in 1E-Nomad-GetCmContentLocations Instruction
    28Monitor
  • CVE-2025-649900 days apartCommand Injection in 1E-Explorer-TachyonCore-LogoffUser Instruction
    28Monitor
  • CVE-2025-649910 days apartCommand Injection in 1E-PatchInsights-Deploy Instruction
    28Monitor
  • CVE-2025-649920 days apartCommand Injection in 1E-Nomad-PauseNomadJobQueue Instruction
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are 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
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-secondary

Attack context

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

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records