How severe is CVE-2016-9497?

CVE-2016-9497 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-9497 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9497?

CVE-2016-9497 primarily affects Hughes Hn7740s Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-9497?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-9497 published?

CVE-2016-9497 was published on 2018-07-13 and last updated on 2026-06-17.

CVE-2016-9497

CVE-2016-9497 is a high-severity vulnerability in Hughes Hn7740s Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Hughes Hn7740s Firmware
Published: 2018-07-13
Last modified: 2026-06-17

Description

Hughes high-performance broadband satellite modems, models HN7740S DW7000 HN7000S/SM, is vulnerable to an authentication bypass using an alternate path or channel. By default, port 1953 is accessible via telnet and does not require authentication. An unauthenticated remote user can access many administrative commands via this interface, including rebooting the modem.

Frequently asked questions

What is CVE-2016-9497?: Hughes high-performance broadband satellite modems, models HN7740S DW7000 HN7000S/SM, is vulnerable to an authentication bypass using an alternate path or channel. By default, port 1953 is accessible via telnet and does not require authentication. An unauthenticated remote user can access many administrative commands via this interface, including rebooting the modem.
How severe is CVE-2016-9497?: CVE-2016-9497 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-9497 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9497?: CVE-2016-9497 primarily affects Hughes Hn7740s Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-9497?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-9497 published?: CVE-2016-9497 was published on 2018-07-13 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:hughes:hn7740s_firmware:6.9.0.34:*:*:*:*:*:*:*
cpe:2.3:o:hughes:dw7000_firmware:6.9.0.34:*:*:*:*:*:*:*
cpe:2.3:o:hughes:hn7000s_firmware:6.9.0.34:*:*:*:*:*:*:*
cpe:2.3:o:hughes:hn7000sm_firmware:6.9.0.34:*:*:*:*:*:*:*

More vulnerabilities in Hughes Hn7740s Firmware

CVE-2016-9495 — High (CVSS 8.8): Hughes high-performance broadband satellite modems, models HN7740S DW7000 HN7000S/SM, uses hard coded credentials.…
CVE-2016-9496 — Medium (CVSS 6.5): Hughes high-performance broadband satellite modems, models HN7740S DW7000 HN7000S/SM, lacks authentication. An…
CVE-2016-9494 — Medium (CVSS 6.5): Hughes high-performance broadband satellite modems, models HN7740S DW7000 HN7000S/SM, are potentially vulnerable to…

All CVEs affecting Hughes Hn7740s Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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