CVE-2020-17456

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 72%
CISA-KEV: Not listedEPSS: 72%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SEOWON INTECH SLC-130 And SLR-120S devices allow Remote Code Execution via the ipAddr parameter to the system_log.cgi page.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
77(Track*)
EG Risk 77/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation72% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
99.4%
KEV
Not listed

Published

August 20, 2020

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Jun 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Seowon SLR-120 Router - Remote Code Execution (Unauthenticated) - Hardware remote Exploit

https://www.exploit-db.com/exploits/50821
generic

Seowon SLC-130 And SLR-120S Router-RCE Exploit + Unlocking method ( CVE-2020-17456 ) | Seowon-SlC-130-And-SLR-120S-Exploit

https://maj0rmil4d.github.io/Seowon-SlC-130-And-SLR-120S-Exploit/
generic

Packet Storm

http://packetstormsecurity.com/files/166273/Seowon-SLR-120-Router-Remote-Code-Execution.html
generic

Packet Storm

http://packetstormsecurity.com/files/158933/Seowon-SlC-130-Router-Remote-Code-Execution.html

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:50 UTCEG score recompute
  4. 2026-07-22 22:35 UTCEG score recompute
  5. 2026-07-22 14:05 UTCEPSS rescore
  6. 2026-07-20 17:04 UTCEPSS rescore
  7. 2026-07-20 17:04 UTCEPSS rescore
  8. 2026-07-16 16:59 UTCEPSS rescore
  9. 2026-07-15 16:55 UTCEPSS rescore
  10. 2026-07-15 01:57 UTCEPSS rescore
  11. 2026-07-13 06:10 UTCEPSS rescore
  12. 2026-07-13 06:10 UTCEPSS rescore
  13. 2026-07-09 19:07 UTCEPSS rescore
  14. 2026-07-08 15:12 UTCEPSS rescore
  15. 2026-07-04 06:29 UTCEPSS rescore
  16. 2026-07-04 06:28 UTCEPSS rescore
  17. 2026-07-01 15:03 UTCEPSS rescore
  18. 2026-06-28 04:54 UTCEPSS rescore
  19. 2026-06-28 04:54 UTCEPSS rescore
  20. 2026-06-25 13:47 UTCEPSS rescore
  21. 2026-06-24 14:03 UTCEPSS rescore
  22. 2026-06-24 14:03 UTCEPSS rescore
  23. 2026-06-23 21:31 UTCEPSS rescore
  24. 2026-06-23 21:31 UTCEPSS rescore
  25. 2026-06-21 14:54 UTCEPSS rescore
Show 25 more
  1. 2026-06-21 14:54 UTCEPSS rescore
  2. 2026-06-21 01:57 UTCEPSS rescore
  3. 2026-06-21 01:57 UTCEPSS rescore
  4. 2026-06-18 17:50 UTCEPSS rescore
  5. 2026-06-17 17:50 UTCEPSS rescore
  6. 2026-06-16 17:50 UTCEPSS rescore
  7. 2026-06-16 17:50 UTCEPSS rescore
  8. 2026-06-15 17:46 UTCEPSS rescore
  9. 2026-06-12 23:10 UTCEPSS rescore
  10. 2026-06-10 22:16 UTCEPSS rescore
  11. 2026-06-10 22:16 UTCEPSS rescore
  12. 2026-06-10 13:20 UTCEPSS rescore
  13. 2026-06-05 22:45 UTCEPSS rescore
  14. 2026-06-05 22:45 UTCEPSS rescore
  15. 2026-06-05 06:08 UTCEPSS rescore
  16. 2026-06-05 06:08 UTCEPSS rescore
  17. 2026-06-04 13:10 UTCEPSS rescore
  18. 2026-06-04 13:10 UTCEPSS rescore
  19. 2026-06-01 13:50 UTCEPSS rescore
  20. 2026-06-01 13:50 UTCEPSS rescore
  21. 2026-05-28 13:43 UTCEPSS rescore
  22. 2026-05-28 13:43 UTCEPSS rescore
  23. 2026-05-27 00:02 UTCEG score recompute
  24. 2026-05-27 00:02 UTCGHSA enrichment
  25. 2026-05-24 16:48 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-50821
    First seen Mar 11, 2022

    Seowon SLR-120 Router - Remote Code Execution (Unauthenticated)

    Open source ↗
  • GitHub PoCAl1ex/CVE-2020-17456
    First seen Jan 21, 2021

    CVE-2020-17456 & Seowon SLC 130 Router RCE

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-17456.yaml
    First seen Jan 1, 2020

    SEOWON INTECH SLC-130 & SLR-120S - Unauthenticated Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-17456?
CVE-2020-17456 is a critical vulnerability published on August 20, 2020. SEOWON INTECH SLC-130 And SLR-120S devices allow Remote Code Execution via the ipAddr parameter to the system_log.cgi page.
When was CVE-2020-17456 disclosed?
CVE-2020-17456 was first published in the National Vulnerability Database on August 20, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-17456 actively exploited?
CVE-2020-17456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-17456?
CVE-2020-17456 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-17456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-17456, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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