Threats / Dasan / CVE-2018-10561
CVE-2018-10561
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Dasan Gigabit Passive Optical Network (GPON) Routers vulnerability
Dasan GPON routers contain an authentication bypass vulnerability (CWE-287) that allows attackers to bypass access controls. When chained with CVE-2018-10562, this enables remote code execution.
Verdict
Today item — known-exploited.
Authentication bypass in Dasan GPON routers permits unauthenticated access to administrative functions. Exploitation is active in the wild with high probability (EPSS 0.93). Chaining with CVE-2018-10562 leads to remote code execution on affected devices.
CISA KEV Yes · 2022-03-314EPSS 0.92371 (verify live)5CVSS 9.8 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
165 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 2022-03-31).
Probability (EPSS)
EPSS 0.92371 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: Dasan, Gigabit Passive Optical Network (GPON) Routers. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-287 Improper Authentication — weakness family: Authentication.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 1427 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
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 bypass authentication controls on the GPON router without valid credentials.
Business
Network perimeter security is compromised; unauthorized access to critical infrastructure devices is established.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I chain this vulnerability with CVE-2018-10562 to achieve remote code execution on the device.
Business
Attacker gains full control of the router, enabling data interception, network manipulation, or lateral movement into connected networks.
3
Lateral reach — past segmentation narrative 3
Attacker
I maintain persistent access by installing backdoors or modifying device firmware.
Business
Long-term compromise of network infrastructure; difficult detection and remediation; potential for widespread customer impact.
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