CVE-2017-16953

CVE-2017-16953 is a high-severity vulnerability in Zte Zxdsl 831cii Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-287.

Key facts

Description

connoppp.cgi on ZTE ZXDSL 831CII devices does not require HTTP Basic Authentication, which allows remote attackers to modify the PPPoE configuration or set up a malicious configuration via a GET request.

Frequently asked questions

What is CVE-2017-16953?
connoppp.cgi on ZTE ZXDSL 831CII devices does not require HTTP Basic Authentication, which allows remote attackers to modify the PPPoE configuration or set up a malicious configuration via a GET request.
How severe is CVE-2017-16953?
CVE-2017-16953 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-16953 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16953?
CVE-2017-16953 affects Zte Zxdsl 831cii Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16953?
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-2017-16953 published?
CVE-2017-16953 was published on 2017-12-01 and last updated on 2026-06-17.

References

Affected products (1)

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