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Fencer Intel
high 7.5

CVE-2017-16953 in the critical feed json

connoppp.cgi on ZTE ZXDSL 831CII devices does not require HTTP Basic Authentication, which allows remote attackers to modify the PPPoE conf…

published 8y ago modified 4mo ago also EUVD-2017-8122

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.3%
EPSS 11.3% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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.

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Timeline

  1. First public exploit (EDB-43188)
  2. Published

Exploit prediction

11.26% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-43188 ZTE ZXDSL 831CII - Improper Access Restrictions webapps, 2017-11-27
  • packetstormsecurity.com http://packetstormsecurity.com/files/145121/ZTE-ZXDSL-831-Unauthorized-Configuration-Access-Bypass.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.