[UPDATE] [high] libarchive: Vulnerability enables Denial of Service and potentially Code Execution
A remote, anonymous attacker can exploit a vulnerability in libarchive and FreeBSD Project FreeBSD OS to execute arbitrary code, and potentially to perform a Denial of Service attack.
CSIRTS triage
- What
- A vulnerability in libarchive and FreeBSD OS enables arbitrary code execution and denial of service.
- Who is affected
- FreeBSD systems using vulnerable versions of libarchive.
- Urgency
- High urgency; remote attackers can execute arbitrary code without authentication.
- Action
- Apply FreeBSD security updates addressing CVE-2025-5914 to libarchive and the OS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-1748
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-2025-59140.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-5914 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- criticalSiemens SIDIS Secured SmartPlugcisa
- unknownNCSC-2026-0229 [1.00] [M/H] Vulnerabilities fixed in Siemens productsncsc-nl
Recent advisories for libarchive
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.
- medium[NEW] [medium] libarchive: Vulnerability enables denial of servicecert-bund · 2026-08-24
- mediumCVE-2026-63134: Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` …nvd · 2026-08-11
- medium[UPDATE] [medium] libarchive: Vulnerability allows code executioncert-bund · 2026-08-11
- medium[UPDATE] [medium] libarchive: Multiple vulnerabilities allow information disclosure and DoScert-bund · 2026-08-11
- lowCVE-2026-16517: Libarchive: libarchive: signed integer overflow in archive_write_zip_headermsrc · 2026-08-06
- low[NEW] [low] libarchive: Vulnerability allows unspecified attackcert-bund · 2026-07-23
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