Hikvision Senior Director of Cybersecurity on Security Concerns Related to Vishing Scams, Part 1

August 3, 2020

Hikvision HikWire blog article Chuck Davis Vishing Part 1

Hikvision senior director of cybersecurity, Chuck Davis, has covered a wide-range of cybersecurity topics in recent HikWire blogs, including “Hikvision Senior Director of Cybersecurity on Security Concerns with Home Router Vulnerability, 3 Tips to Improve Home Router Security.”

Today, Hikvision’s Davis will explain vishing scams.

What is Vishing?
Phone scams are almost as old as the telephone itself. In fact, most of us have likely been the target of a vishing attack but were not familiar of the term, vishing. According to Proofpoint’s 2020 State of the Phish Report, only 25 percent of those polled were able to accurately define the term.

Vishing is a combination of the word “voice” and the word “phishing”: voice + phishing = vishing.

Vishing is a form of phishing that uses voice calls rather than email to trick a victim into divulging personal, sensitive or confidential information to an attacker. Essentially, it’s a new term for the old phone scam. Vishing scams come in all forms, including debt collection, charities raising money, and attackers pretending to be calling from your bank.

CSO online wrote: “Almost all vishing attacks have a few things in common. The phone calls are initially placed via voice over IP (VoIP) services, which makes them easier for the vishers to automate some or all of the process and more difficult for victims or law enforcement to trace. And the attackers' ultimate goal is to profit from you in some way.”

This approach allows attackers to spoof caller ID so in some cases the call looks as if it is coming from a known or trusted phone number.

Vishing Statistics
To better understand how prevalent vishing attacks are, the following statistics were taken from the 2019 Scam Call Trends and Projections Report:

  • More than 28 percent of all scam calls targeted victims using personal data.
  • 75 percent of all scam victims were called by scammers who already had their personal information.
  • Nearly 1 in 3 people who experienced a loss of at least $1,000 thought they were answering a call from a business they knew.
  • 39 percent of victims said the scammers knew their home address.
  • 75 percent of scam victims reported that the scam callers were able to verify all or part of their social security number.

Check back tomorrow when we’ll overview examples of vishing, and ways to prevent becoming a victim to this security concern.

IMPORTANT! This model requires non-standard firmware. Do Not Install standard firmware (e.g. v.4.1.xx) on this model. Doing so will permanently damage your system. You must use custom firmware v.4.1.25 from the iDS-9632NXI-I8/16S product page.

View the most updated version of this document here:


The I-series NVR (such as the DS-7716NI-I4) is one of Hikvision's most popular and feature-rich recorders. As such, many firmware revisions have been introduced over the years to continually ensure the product is compatible with the newest technology available. Due to the many revisions, we recommend that the user closely follows the instructions below in order to reduce the amount of time spent as well as the chance of failure.


Database Optimization and Repair

As more affordable IP cameras are introduced over time with greater video resolution and data sizes, more efficient database management also becomes necessary. The introduction of firmware v4.0 brought about a new database architecture in order to be futureproof.


After upgrading to v4.X, the recorder database will need to be converted and optimized. If you are experiencing issues where playback is expected but not found, make sure "Database Repair" is performed as indicated in the procedures and scenarios below.


Preparing the Upgrade

Before proceeding with upgrade, it is recommended that NVR configuration file is exported from the NVR over the network or on to a local USB drive.


Upgrading from v3.4.92 build 170518 or Older

  1. All recorders must reach v3.4.92 before proceeding further. Upgrading from versions before v3.4.92 directly to any version of v4.X will likely cause the recorder to fail.
  2. If the recorder is already at v3.4.92, a full factory default is highly recommended before upgrading to any version of v4.X. There is a high chance of unit failure (requiring RMA) if the unit is not defaulted before upgrade.
  3. After reaching v3.4.92 and performing a full factory default, an upgrade directly to v4.50.00 is acceptable.
  4. After the upgrade is completed and the recorder is reprogrammed, it may be beneficial to perform a Database Repair. For details, refer to the section "Database Optimization and Repair" above.
  5. To verify repair progress, you may refer to the HDD status, or search the recorder log for repair started and stopped entries. Note that while the HDD is repairing, new recordings are still being made, but some existing recordings may not be searchable until repair is complete.
  6. If you continue to observe playback issues after database repair, ensure there are no power, network, or motion detection issues. Should the problem persist, contact technical support.


Upgrading from Any v4.X Build to v4.50.00.

  1. Any v4.X build can be upgraded directly to v4.50.00.
  2. Export configuration is highly recommended before performing the upgrade.
  3. If upgrading from any v4.X version that was not v4.22.005, a Database Repair is recommended. Refer to Step 4 and onwards in the previous section.



Downgrading is not recommended. Due to new features and parameters constantly being added, downgrading may cause the NVR to factory default itself or require a manual default to operate properly.

By downloading and using software and other materials available via this website, you agree to be legally bound by HIKVISION General Terms of Use . If you don’t agree to these terms, you may not download or use any of those materials.

If you are agreeing on behalf of your company, you represent and warrant that you have legal authority to bind your company to the General Terms of Use above. Also you represent and warrant that you are of the legal age of majority in the jurisdiction in which you reside (at least 18 years of age in many countries).