CVE-2023-33010 Details
The ID processing function in Zyxel has a buffer overflow vulnerability that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device. It affects Zyxel ATP 4.32 through 5.36 Patch 1, USG FLEX series 4.50 through 5.36 Patch 1, USG FLEX 50(W) 4.25 through 5.36 Patch 1, USG20(W)-VPN 4.25 through 5.36 Patch 1, VPN series 4.30 through 5.36 Patch 1, and ZyWALL/USG series 4.25 through 4.73 Patch 1.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2023-33010
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%).
28.81 Probability of exploitation activity being observed over the next 30 days (98th percentile)
CVSS score for CVE-2023-33010
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.
9.8 Critical

CVE-2023-33010 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
IT 499 13.90%
US 488 13.59%
FR 435 12.11%
TW 223 6.21%
CH 219 6.10%
SE 185 5.15%
KR 154 4.29%
RU 152 4.23%
AT 115 3.20%
ES 111 3.09%

Is CVE-2023-33010 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-2023-33010 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 1,843 85.13%
Technology 156 7.21%
Utilities 39 1.80%
Consumer Goods 38 1.76%
Engineering 26 1.20%
Business Services 14 0.65%
Education 8 0.37%
Tourism/Hospitality 8 0.37%
Energy/Resources 7 0.32%
Government/Politics 7 0.32%

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