[UPDATE] [medium] 7-Zip: Multiple vulnerabilities

CSIRTS triage

What

Multiple vulnerabilities allow a remote, anonymous attacker to disclose memory contents, trigger a denial-of-service, or execute arbitrary code.

Who is affected

Deployments of 7-Zip.

Urgency

Remediation is high urgency due to the severity and potential for exploitation.

Action

Update to the latest version of 7-Zip.

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

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-07-02

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-2026-1736

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-2026-480920.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all scored CVEs.
• Low exploitation riskCVE-2026-481010.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.
• Low exploitation riskCVE-2026-481020.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.
• Low exploitation riskCVE-2026-481030.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all scored CVEs.
• Low exploitation riskCVE-2026-481040.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.
• Low exploitation riskCVE-2026-481110.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all scored CVEs.
• Low exploitation riskCVE-2026-481120.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.

Referenced CVEs

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.

• 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
• unknownCVE-2026-55781: NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.…nvd · 2026-07-10
• unknownCVE-2026-55780: NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.…nvd · 2026-07-10
• high[UPDATE] [high] 7-Zip: Vulnerability allows code executioncert-bund · 2026-07-02
• lowCVE-2026-58052: 7-Zip for Windows through 26.02 fails to preserve the Mark-of-the-Web when extracting a crafte…nvd · 2026-06-28

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