Cyber Resilience

CVE-2021-42755

Medium

Published: 18 July 2022

Published
18 July 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS Score 0.0010 27.4th percentile
Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-42755 is a medium-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Fortinet Fortios. Its CVSS base score is 4.3 (Medium).

Operationally, ranked at the 27.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

An integer overflow / wraparound vulnerability [CWE-190] in FortiSwitch 7.0.2 and below, 6.4.9 and below, 6.2.x, 6.0.x; FortiRecorder 6.4.2 and below, 6.0.10 and below; FortiOS 7.0.2 and below, 6.4.8 and below, 6.2.10 and below, 6.0.x; FortiProxy 7.0.0, 2.0.6 and below,…

more

1.2.x, 1.1.x, 1.0.x; FortiVoiceEnterprise 6.4.3 and below, 6.0.10 and below dhcpd daemon may allow an unauthenticated and network adjacent attacker to crash the dhcpd deamon, resulting in potential denial of service.

CWE(s)
CWE-190

Related Threats

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

Affected Assets

fortinet
fortiproxy
7.0.0 · 1.0.0 — 1.0.7 · 1.1.0 — 1.1.6 · 1.2.0 — 1.2.13
fortinet
fortivoice
5.3.0, 5.3.1, 5.3.10, 5.3.11, 5.3.12
fortinet
fortios
5.4.0, 5.4.1, 5.4.10, 5.4.11, 5.4.12
fortinet
fortirecorder firmware
6.0.0, 6.0.1, 6.0.10, 6.0.2, 6.0.3
fortinet
fortiswitch
6.0.0 — 6.0.7 · 6.2.0 — 6.2.7 · 6.4.0 — 6.4.9

Mitigating Controls

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

References