CVE-2021-3708DSL-2750U OS Command Injection
D-Link router DSL-2750U with firmware vME1.16 or prior versions is vulnerable to OS command injection.
Published Aug 16, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2021-3708 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Dsl-2750u Firmware (Dlink), DSL-2750U.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 20, 2023. No public exploit code is known.
- EPSS estimates a 25% probability of exploitation in the next 30 days.
- Fixed versions are available, including Dsl-2750u Firmware <=1.16, Dsl-2750u Firmware 1.16.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
25%
Higher than 97.8% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
48/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 20, 2023
795 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
10
Reports of active use
Advisories And Exploit References
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Oct 20, 2023 | n/a | Not reported |
| Industry KEV feed | Oct 20, 2023 | n/a | Not reported |
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Dsl-2750u FirmwareDlink | See advisory | 1.16 |
| DSL-2750U | >= firmware vME1.16 or prior versions | n/a |
Patched Releases
Dsl-2750u Firmware
<=1.16
Timeline
Publicly disclosed
Aug 16, 2021
Added to CIRCL KEV
Oct 20, 2023
Added to Industry KEV feed
Oct 20, 2023
Last updated
Nov 21, 2024
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryJVNVU#92088210: Multiple vulnerabilities in D-Link router DSL-2750U
- advisorysupportannouncement.us.dlink.com · publication.aspx
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
D-Link router DSL-2750U with firmware vME1.16 or prior versions is vulnerable to OS command injection.
Affected: Dsl-2750u Firmware (Dlink); DSL-2750U versions >= firmware vME1.16 or prior versions. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 20, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Dsl-2750u Firmware <=1.16, Dsl-2750u Firmware 1.16.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2021-3708 On Your Attack Surface?
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