Threats / D-Link / CVE-2023-25280
CVE-2023-25280
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
D-Link DIR-820 Router vulnerability
D-Link DIR-820 routers are vulnerable to unauthenticated OS command injection via the ping_addr parameter in ping.ccp, allowing remote attackers to achieve root privilege escalation.
Verdict
Today item — known-exploited.
A remote unauthenticated attacker can inject arbitrary OS commands through a vulnerable ping utility parameter, gaining complete control of affected routers. The high EPSS score and active exploitation in the wild indicate immediate risk to exposed devices.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
6 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-09-30).
Probability (EPSS)
EPSS 0.98053 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: D-Link, DIR-820 Router. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-78 OS Command Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious ping request with shell metacharacters in the ping_addr parameter to bypass input validation.
Business
The router processes untrusted input without sanitization, creating an entry point for command execution.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I inject OS commands that execute with the privileges of the ping utility process, typically root on embedded devices.
Business
Attackers gain root-level access to the router without authentication, bypassing all security controls.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistent access, modify firewall rules, or pivot to internal network resources.
Business
The compromised router becomes an attack platform for lateral movement, data exfiltration, or network-wide compromise.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05