Cyber Resilience

CVE-2023-6764

High

Published: 20 February 2024

Published
20 February 2024
Modified
21 January 2025
KEV Added
—
Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0233 85.2th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-6764 is a high-severity Use of Externally-Controlled Format String (CWE-134) vulnerability in Zyxel Atp100 Firmware. Its CVSS base score is 8.1 (High).

Operationally, ranked in the top 14.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware…

more

versions from 4.16 through 5.37 Patch 1, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.

CWE(s)
CWE-134

Related Threats

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

Affected Assets

zyxel
atp100 firmware
5.37 · 4.32 — 5.37
zyxel
atp100w firmware
5.37 · 4.32 — 5.37
zyxel
atp200 firmware
5.37 · 4.32 — 5.37
zyxel
atp500 firmware
5.37 · 4.32 — 5.37
zyxel
atp700 firmware
5.37 · 4.32 — 5.37
zyxel
atp800 firmware
5.37 · 4.32 — 5.37
zyxel
usg flex 100 firmware
5.37 · 4.50 — 5.37
zyxel
usg flex 100ax firmware
5.37 · 4.50 — 5.37
zyxel
usg flex 100h firmware
5.37 · 4.50 — 5.37
zyxel
usg flex 100w firmware
5.37 · 4.50 — 5.37
+11 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References