What is CVE-2017-15997?

CVE-2017-15997 is a high-severity vulnerability in Nq Contacts Backup \& Restore, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.8/10. Published 2017-10-29.

How severe is CVE-2017-15997?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Nq Contacts Backup \& Restore

CVE-2017-15997

In the "NQ Contacts Backup & Restore" application 1.1 for Android, RC4 encryption is used to secure the user password locally stored in shared preferences. Because there is a static RC4 key, an attacker can gain access to user credentials more easily by leveraging access to the preferences XML file.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2017-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Nq Contacts Backup \& Restore — versions 1.1

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

1337sec.blogspot.de/2017/10/auditing-nq-contacts-backup-restore-11.html (Third Party Advisory)

Frequently asked questions

What is CVE-2017-15997?: CVE-2017-15997 is a high-severity vulnerability in Nq Contacts Backup \& Restore, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.8/10. Published 2017-10-29.
How severe is CVE-2017-15997?: High severity. CVSS v3 base score is 7.8 out of 10.