What it is
CVE-2025-34049 is OptiLink ONT1GEW GPON Remote Code Execution. An OS command injection vulnerability exists in the OptiLink ONT1GEW GPON router firmware version V2.1.11_X101 Build 1127.190306 and earlier. The router’s...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2025-34049
OptiLink ONT1GEW GPON Remote Code Execution
OptiLink / ONT1GEW GPON · 0 to <= V2.1.11_X101 Build 1127.190306
- Severity
- CVSS 9.4 · Critical
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 2.4%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
OptiLink / ONT1GEW GPON 0 to <= v2.1.11_x101 build 1127.190306.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
OptiLink ONT1GEW GPON Remote Code Execution
An OS command injection vulnerability exists in the OptiLink ONT1GEW GPON router firmware version V2.1.11_X101 Build 1127.190306 and earlier. The router’s web management interface fails to properly sanitize user input in the target_addr parameter of the formTracert and formPing administrative endpoints.
An authenticated attacker can inject arbitrary operating system commands, which are executed with root privileges, leading to remote code execution. Successful exploitation enables full compromise of the device. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-04 UTC.
Vendor
Product
Affected
Status
OptiLink
ONT1GEW GPON
Through V2.1.11_X101 Build 1127.190306
Affected
- Published
- 26 Jun 2025
- Exploitation Reported
- 26 Jun 2025
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- High
- User interaction
- None
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-34049
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://vulncheck.com/advisories/optilink-ont1gew-router-rce
- Exploit — exploit-db.com exploit-db.com · Exploit https://www.exploit-db.com/exploits/49955
- Exploit — packetstorm.news packetstorm.news · Exploit https://packetstorm.news/files/id/162993
- Product — optilinknetwork.com optilinknetwork.com · Product https://optilinknetwork.com/
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
The Shadowserver
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-06-26 15:52 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v4.0
9.4
Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
2.4%
Timeline
From disclosure to observed exploitation
-
CVE published
Vulnerability disclosed publicly
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2025-34049
Free JSON includes basic KEV fields{
"cve_id": "CVE-2025-34049",
"confidence": "High",
"cvss_score": 9.4,
"cvss_estimated": false,
"epss_score": 0.0243,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.