REVZERO SENTINEL — Daily Threat Report HU

Hungary hit with massive 762-threat wave as scans target exposed databases

| Author: REVZERO SENTINEL Editorial | Budapest, Hungary
Hungarian networks absorbed a staggering 762 cyber threats yesterday — a 157.4% surge from the previous day's 296 incidents. The overwhelming majority targeted unsecured databases and container services, with Redis, Docker, and Elasticsearch ports bearing the brunt of what appears to be a coordinated scanning campaign.
762
total events
▲ 157.4%
445
critical
237
high
80
medium

A Friday to forget

The jump from 296 to 762 detected threats in a single day isn't just statistical noise — it's a flashing red light. To put it bluntly, Hungary's digital infrastructure caught the attention of someone, or something, with considerable resources. The severity breakdown tells its own uncomfortable story: 445 critical-severity threats dominated the landscape, joined by 237 high-severity incidents. Medium-severity events accounted for just 80 detections, while low-severity threats registered a perfect zero. This wasn't opportunistic background noise. This was targeted, aggressive, and designed to find weaknesses.

The threat composition reinforces that assessment. Vulnerability-related detections — essentially probes looking for unpatched or misconfigured systems — made up 662 of the day's total. Malicious activity accounted for the remaining 100. In other words, attackers were far more interested in finding open doors than kicking them down.

Redis, Docker, and the database gold rush

Port 6379/tcp, associated with Redis in-memory databases, absorbed 224 hits — nearly a third of all detected activity. That's not random. Redis instances left exposed to the internet have become low-hanging fruit for ransomware groups and cryptominers, who can exploit them without authentication in many default configurations. Docker's API port (2375/tcp) followed with 110 attempts, another service notorious for being spun up with inadequate access controls. Elasticsearch on port 9200/tcp saw 88 probes. MongoDB on 27017/tcp added another 11. The pattern is unmistakable: automated tools sweeping the internet for databases that shouldn't be publicly accessible.

Legacy protocols weren't ignored either. Telnet on port 23 logged 100 attempts, a reminder that ancient services still haunt many networks. Windows Remote Desktop (3389/tcp) drew 80 probes, while SMB file-sharing (445/tcp) accounted for 49 — both perennial favorites for initial access brokers. Anyone still running these services without robust authentication and network segmentation is essentially publishing an invitation.

The usual suspects and a Seychelles surprise

Attack traffic originated from predictable corners of the globe. The United States led with 15 detected source addresses, followed closely by China at 13. Germany contributed 9 sources, while Romania and Russia each accounted for 8. These numbers reflect established patterns — major cyber powers and Eastern European nodes consistently appear in Hungarian threat data. But Seychelles appearing with 5 source addresses raises eyebrows. The island nation has developed a reputation as a bulletproof hosting haven, where certain providers turn a blind eye to abuse complaints. When Seychelles IPs show up alongside those from Beijing and Moscow, it often indicates threat actors routing through jurisdictions that won't cooperate with international investigations.

Telekom and DIGI bear the burden

Magyar Telekom absorbed 165 of the day's incidents, with DIGI close behind at 158. Together, the two providers represented more than 40% of all detected threats. Invitech recorded 81 events, while Vodafone Hungary saw 41. Several smaller autonomous systems — AS62214 with 32 hits and AS42964 with 29 — rounded out the list. The concentration in major ISPs isn't surprising; they control the largest address blocks and serve the most customers. But it does suggest that compromised home routers, misconfigured small business servers, and IoT devices within these networks may be contributing to the overall exposure.

Government networks fared remarkably well. Only four events touched government infrastructure, and none reached critical severity. Whether that reflects superior security hygiene or simply a lower profile in yesterday's campaign remains unclear. Either way, the contrast with commercial ISP exposure is striking.

What comes next

Two active intelligence sources fed yesterday's detection data — a relatively lean number that suggests Hungary's threat visibility depends heavily on a small set of feeds. Expanding that ecosystem could provide earlier warning of campaigns like this one, which appears to have struck with little preamble. For organizations running Redis, Docker, Elasticsearch, or MongoDB instances, the message is urgent: verify that these services aren't exposed to the public internet, apply authentication where available, and segment sensitive databases from external access. The attackers have clearly added Hungarian IP ranges to their automated sweep lists. The question now is whether administrators have closed the doors before anyone walked through.

A 157% single-day spike in threats doesn't happen in a vacuum. Whether this represents a new sustained campaign or a brief but intense scanning burst, Hungarian network operators would be wise to treat it as a wake-up call. The services being probed — databases, container APIs, remote access ports — are the same ones that have fueled countless breaches worldwide. The difference between a detected threat and a successful compromise often comes down to hours, not days.

Attack sources by country

Severity distribution

Critical
445
High
237
Medium
80

Threat types

Vulnerability 662
Malicious activity 100

Notable events

Nyitott Telnet (23/tcp): *.*.*.* (Budapest)
High · Budapest
Nyitott Telnet (23/tcp): *.*.*.* (Makó)
High · Makó
Nyitott Telnet (23/tcp): *.*.*.* (Nagyatád)
High · Nagyatád
Nyitott Telnet (23/tcp): *.*.*.* (Budapest)
High · Budapest
Nyitott Busybox telnetd (23/tcp): *.*.*.* (Békéscsaba)
High · Békéscsaba
Nyitott Telnet (23/tcp): *.*.*.* (Budapest)
High · Budapest
Nyitott Telnet (23/tcp): *.*.*.* (Celldömölk)
High · Celldömölk
Nyitott Telnet (23/tcp): *.*.*.* (Makó)
High · Makó
Nyitott Telnet (23/tcp): *.*.*.* (Makó)
High · Makó
Nyitott Telnet (23/tcp): *.*.*.* (Siófok)
High · Siófok

Most targeted ports

6379/tcp 224x
2375/tcp 110x
23/tcp 100x
9200/tcp 88x
3389/tcp 80x
445/tcp 49x
27017/tcp 11x

Affected Hungarian ISPs

Magyar Telekom 165 events
DIGI 158 events
Invitech 81 events
Vodafone HU 41 events
AS62214 32 events
AS42964 29 events
AS47381 25 events
AS50261 23 events

Government infrastructure

In the past 24 hours, 4 events were recorded on government networks, of which 0 were critical severity.

Frequently asked questions

How many cyberattacks hit Hungary on 2026. február 21., szombat?
762 cyber threats were detected, of which 445 were critical severity.
Which country launched the most attacks?
Most attacks originated from United States, accounting for 15.0% of all identified sources.
What types of attacks targeted Hungary?
Detected threats included: Vulnerability, Malicious activity.
What is REVZERO SENTINEL?
REVZERO SENTINEL is a real-time cyber threat monitoring system that collects and analyzes cyberattacks targeting Hungary from multiple independent threat intelligence sources.

Methodology and data sources

The REVZERO SENTINEL editorial team collects data from multiple independent, publicly available threat intelligence sources. 2 active sources continuously monitor cyber threats targeting Hungary. Only aggregated, anonymized data appears in reports — no information suitable for identifying individual targets is published.

REVZERO SENTINEL serves the protection of Hungary's cyberspace. It operates independently and has no affiliation with any government agency.