[NEW] [medium] 7-Zip: Vulnerability allows code execution

mediumpublic exploitCVE-2026-14266

A remote, anonymous attacker can exploit a vulnerability in 7-Zip to execute arbitrary program code.

CSIRTS triage

vendor: 7-Zip product: 7-Zip Remote code execution

What: A vulnerability allows a remote, anonymous attacker to execute arbitrary program code.
Who is affected: Users of 7-Zip.
Urgency: Remediation is important as this vulnerability can lead to arbitrary code execution.
Action: Update to the latest version of 7-Zip.

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

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-30
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-2026-2369

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-2026-142660.92% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 57% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-14266	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-14266: 7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vu…nvd

Recent advisories for 7-Zip

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.

highCVE-2026-14266: 7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vu…nvd · 2026-07-29
medium[UPDATE] [medium] 7-Zip: Multiple vulnerabilitiescert-bund · 2026-07-28
high[UPDATE] [high] 7-Zip: Vulnerability allows code executioncert-bund · 2026-07-28
low[UPDATE] [UNPATCHED] [low] 7-Zip: Vulnerability allows bypassing of security measurescert-bund · 2026-07-28
unknownCVE-2026-55783: NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.…nvd · 2026-07-10
unknownCVE-2026-55782: NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.…nvd · 2026-07-10