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CVE-2022-43389

32
FAUCET Score

CVE-2022-43389 is a critical buffer overflow vulnerability affecting Zyxel NR7101 firmware versions prior to V1.15(ACCC.3)C0. This flaw, rated 9.8 CVSS (Critical), allows an unauthenticated attacker to remotely execute OS commands or trigger denial-of-service conditions. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating potential interest. Organizations using affected Zyxel NR7101 devices should prioritize patching to mitigate this high-risk vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.00\(abwf.1\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:lte3202-m437_firmware:*:*:*:*:*:*:*:*
< 2.00\(abmp.6\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:lte3316-m604_firmware:*:*:*:*:*:*:*:*
< 1.00\(abra.6\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:lte7480-m804_firmware:*:*:*:*:*:*:*:*
< 1.00\(abqy.5\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:lte7490-m904_firmware:*:*:*:*:*:*:*:*
< 1.15\(acgd.3\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:nebula_fwa510_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 26th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

zyxel.com / global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-buffer-overflow-vulnerabilities-of-cpe-fiber-onts-and-wifi-extenders
Vendor Advisory