Cyber Resilience

CVE-2023-27989

Medium

Published: 05 June 2023

Published
05 June 2023
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0054 67.9th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-27989 is a medium-severity Classic Buffer Overflow (CWE-120) vulnerability in Zyxel Lte7480-M804 Firmware. Its CVSS base score is 6.5 (Medium).

Operationally, ranked in the top 32.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-120

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

zyxel
lte7480-m804 firmware
≤ 1.00\(abra.6\)c0
zyxel
lte7490-m904 firmware
≤ 1.00\(abqy.5\)c0
zyxel
nr7101 firmware
≤ 1.00\(abuv.7\)c0
zyxel
nebula nr7101 firmware
≤ 1.15\(accc.3\)c0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

References