[NEW] [UNPATCHED] [medium] BusyBox: Multiple vulnerabilities allow Denial of Service

mediumCVE-2026-38752 CVE-2026-38753 CVE-2026-38754 CVE-2026-38755

A remote, anonymous attacker can exploit multiple vulnerabilities in BusyBox to carry out a Denial of Service attack.

CSIRTS triage

vendor: BusyBox product: BusyBox Denial of service

What: Multiple vulnerabilities in BusyBox can be exploited to perform Denial of Service attacks.
Who is affected: Remote, anonymous attackers can exploit these vulnerabilities in BusyBox.
Urgency: Remediation is medium urgency due to the potential for service disruption.
Action: Users should apply patches or mitigations as they become available.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch BusyBox

Get an email when a new BusyBox advisory drops — max one per day, one-click unsubscribe.

Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-21
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2386

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-387520.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
Low exploitation riskCVE-2026-387530.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.
Low exploitation riskCVE-2026-387540.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
Low exploitation riskCVE-2026-387550.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-38752	coverage & exploitation status	NVD · CVE.org
CVE-2026-38753	coverage & exploitation status	NVD · CVE.org
CVE-2026-38754	coverage & exploitation status	NVD · CVE.org
CVE-2026-38755	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for BusyBox

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

low[UPDATE] [low] BusyBox: Multiple vulnerabilitiescert-bund · 2026-07-24
lowCVE-2026-38755: A heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attacker…nvd · 2026-07-15
mediumCVE-2026-38754: A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers…nvd · 2026-07-15
lowCVE-2026-38752: A stack overflow in the evaluate() function (editors/awk.c) of BusyBox commit 371fe9 allows at…nvd · 2026-07-15
mediumCVE-2026-38753: A use-after-free in the awk_sub() function (editors/awk.c) of Busybox v1.38.0 allows attackers…nvd · 2026-07-15
medium[UPDATE] [medium] BusyBox: Vulnerability allows file manipulationcert-bund · 2026-07-15