CVE-2020-11881 Details
An array index error in MikroTik RouterOS 6.41.3 through 6.46.5, and 7.x through 7.0 Beta5, allows an unauthenticated remote attacker to crash the SMB server via modified setup-request packets, aka SUP-12964.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2020-11881
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
4.34 Probability of exploitation activity being observed over the next 30 days (90th percentile)
CVSS score for CVE-2020-11881
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2020-11881

CVE-2020-11881 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
RU 2,330 11.43%
BR 1,528 7.50%
ID 1,193 5.85%
TH 1,090 5.35%
IN 999 4.90%
UA 937 4.60%
PL 878 4.31%
VN 834 4.09%
CN 787 3.86%
CZ 674 3.31%

Is CVE-2020-11881 part of your extended attack surface? Bitsight helps security leaders rapidly identify exposure and detect threats in order to prioritize, communicate, and mitigate risk.

View interactive product tours

CVE-2020-11881 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 5,596 84.76%
Technology 613 9.29%
Consumer Goods 134 2.03%
Energy/Resources 61 0.92%
Education 32 0.48%
Government/Politics 31 0.47%
Engineering 28 0.42%
Business Services 19 0.29%
Aerospace/Defense 17 0.26%
Utilities 17 0.26%

Bitsight, the leading provider in Cyber Risk Management, introduced the next-generation internet scanner Bitsight Groma in May 2024. This technology continuously scans the entire internet to discover assets, collect asset attribution evidence, and identify an ever-growing set of security observations, such as vulnerabilities and misconfigurations. Groma’s scanning activities presently encompass:


  • 40 million-plus monitored organizations
  • 250 million-plus host names
  • 4 billion-plus routable IPv4 and IPv6 addresses

Greynoise’s recent study testifies the speed of Bitsight Groma.

Bitsight data discovery
Governance charcoal background

Bitsight TRACE team investigates security incidents and identifies vulnerabilities and threats.

View latest security research 

See what you’re up against across the expanding attack surface. Prioritize what matters most. And mitigate where you’re most vulnerable.

External Attack Surface Management