The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows remote attackers to obtain root access to the Network Processor (NP) Linux system by enabling a TELNET daemon (through CVE-2017-9479 exploitation) and then establishing a TELNET session.
CVE-2017-9482
CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 83.0%
- KEV
- Not listed
Published
July 31, 2017
Last Modified
May 13, 2026
Advisory Details (1)
Auto-updated May 17, 2026🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available
CableTap/doc/advisories/bastille-25.atom-telnet.txt at master · BastilleResearch/CableTap · GitHub
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-25.atom-telnet.txtFrequently asked(5)
What is CVE-2017-9482?
CVE-2017-9482 is a critical vulnerability published on July 31, 2017. The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows remote attackers to obtain root access to the Network Processor (NP) Linux system by enabling a TELNET daemon (through CVE-2017-9479 exploitation) and then establishing a TELNET…
When was CVE-2017-9482 disclosed?
CVE-2017-9482 was first published in the National Vulnerability Database on July 31, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-9482 actively exploited?
CVE-2017-9482 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-9482?
CVE-2017-9482 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-9482?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-9482, 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
Explore the affected products and dependency analysis for CVE-2017-9482
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