CVE-2021-3708 (GCVE-0-2021-3708)

Vulnerability from cvelistv5 – Published: 2021-08-16 04:55 – Updated: 2024-08-03 17:01
VLAI Shadowserver Previdian
Summary
D-Link router DSL-2750U with firmware vME1.16 or prior versions is vulnerable to OS command injection. An unauthenticated attacker on the local network may exploit this, with CVE-2021-3707, to execute any OS commands on the vulnerable device.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
D-Link DSL-2750U Affected: firmware vME1.16 or prior versions
guessed Create a notification for this product.
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c55dcffc-bb10-4d60-b7cf-af14d241131b

Vulnerability ID: CVE-2021-3708

Status: Confirmed

Status Updated: 2026-09-06 00:00 UTC

Exploited: Yes

Characteristics
Severity: 55.0
Timestamps
First Seen: 2023-10-20
Asserted: 2023-10-20
Last Seen: 2026-09-06
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: D-Link / D-Link DSL-2750U | Class: router | Severity: Medium (CVSS 5.5) | IoT: yes | In CISA KEV: no | Honeypot connections on 2026-09-06: 34
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot yes
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class router
7D Avg 0
Vendor D-Link
30D Avg 0
90D Avg 0
Product D-Link DSL-2750U
Cisa Kev no
Connections 34
Observation Date 2026-09-06
Vulnerability Class CVSS
Vulnerability Score 5.5
Vulnerability Severity Medium
References
Created: 2026-07-01 05:54 UTC | Updated: 2026-09-08 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5416b772-2fc6-47c4-a6ad-e551f66bf0b4

Vulnerability ID: CVE-2021-3708

Status: Confirmed

Status Updated: 2026-01-16 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-01-16
Asserted: 2026-01-16
Scope
Notes: KEVIntel entry: D-Link router DSL-2750U with firmware vME1.16 or prior versions is vulnerable to OS command injection. An unauthenticated attacker on the local... | Affected: D-Link / DSL-2750U | CVSS: 7.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title D-Link router DSL-2750U with firmware vME1.16 or prior versions is vulnerable to OS command injection. An unauthenticated attacker on the local...
Vendor D-Link
Product DSL-2750U
Added Date 2026-01-16T00:00:00.000Z
Cvss Score 7.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-19 12:42 UTC | Updated: 2026-06-19 12:42 UTC
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.