Page generated: 11 Nov 2026, 03:35 UTC
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CVE-2026-67277

RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet b…

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RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail from a kernel packet buffer. A separate unchecked, inverted packet-size interval causes unsigned integer underflow, anomalously large fragmented output, and can restart the RouterOS kernel. This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
CVSS 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.3/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.8: +1.32
  • Fresh EPSS: 1.56%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 9 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Rescana
Press · 25 Sep 2026, 07:00 · Active Exploitation Alert: MikroTik RouterOS “MikroTrick” — CVE-2026-67277 / CVE-2026-86060 Added to CISA KEV - Rescana
Recorded Future
Press · 13 Sep 2026, 07:00 · September 2026 CVE Landscape - Recorded Future
The Hacker News
Press · 12 Sep 2026, 07:00 · CISA Adds 5 Actively Exploited Artifactory, ScreenConnect, and RouterOS Flaws to KEV - The Hacker News
Cyber Press
Press · 11 Sep 2026, 07:00 · CISA Warns MikroTik RouterOS Flaw Is Exploited to Escalate Privileges - Cyber Press
Industrial Cyber
Press · 09 Sep 2026, 07:00 · CERT Polska alerts MikroTik RouterOS vulnerabilities actively being exploited in ‘MikroTrick’ attack chain - Industrial Cyber
See all 9 source documents
Help Net Security
Press · 07 Sep 2026, 07:00 · Hackers exploit RouterOS flaws to hijack MikroTik devices without authentication - Help Net Security
CCB Belgium
Press · 07 Sep 2026, 07:00 · Warning: Critical vulnerabilities in Mikrotik RouterOS, Patch immediately! - CCB Belgium
BleepingComputer
Press · 07 Sep 2026, 07:00 · Hackers exploit new MikroTik RouterOS flaws to hijack routers - BleepingComputer
CERT Polska
Press · 05 Sep 2026, 07:00 · Vulnerabilities in Mikrotik RouterOS software - CERT Polska

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.3 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.8; EPSS 1.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 14:00:20.868659+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
05 Sep 2026, 07:00
Published
05 Sep 2026, 20:00
Added to the CISA KEV catalog
10 Sep 2026, 00:00
Latest press mention
25 Sep 2026, 07:00
Score calculated
05 Nov 2026, 14:00