What is CVE-2023-27989?

CVE-2023-27989 is a medium-severity vulnerability in Zyxel Lte7480-M804, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2023-06-05.

How severe is CVE-2023-27989?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2023-27989 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Zyxel Lte7480-M804

CVE-2023-27989

A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.

Vulnerability class: Buffer Overflow

EPSS: 0.010 (59.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zyxel Lte7480-m804
Zyxel Lte7480-m804_firmware
Zyxel Lte7490-m904
Zyxel Lte7490-m904_firmware
Zyxel Nebula_nr7101
Zyxel Nebula_nr7101_firmware
Zyxel Nr7101
Zyxel Nr7101 Firmware — versions < V1.00(ABUV.8)C0
Zyxel Nr7101_firmware

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

attilaszia/linux-iot-cves

References

security@zyxel.com.tw (vendor-advisory, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2023-27989?: CVE-2023-27989 is a medium-severity vulnerability in Zyxel Lte7480-M804, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2023-06-05.
How severe is CVE-2023-27989?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2023-27989 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.