[UPDATE] [low] libxml2: Vulnerability allows Denial of Service

lowCVE-2025-6170

A remote, anonymous attacker can exploit a vulnerability in libxml2 to conduct a Denial of Service attack.

CSIRTS triage

vendor: libxml2 product: libxml2 Denial of service

What: A vulnerability allows a remote attacker to conduct a Denial of Service attack.
Who is affected: Deployments of libxml2 are affected.
Urgency: Remediation is low urgency as the vulnerability is less severe.
Action: Update to the latest version of libxml2 to mitigate this vulnerability.

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: low
Published: 2026-07-09
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-2025-1325

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-2025-61700.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-6170	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

criticalSiemens SINEC OScisa

Recent advisories for libxml2

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[UPDATE] [medium] libxml2: Vulnerability allows denial of servicecert-bund · 2026-07-08
medium[UPDATE] [medium] libxml2: Vulnerability allows information disclosurecert-bund · 2026-07-08
medium[UPDATE] [medium] libxml2 (exsltDynMapFunction): Vulnerability allows denial of servicecert-bund · 2026-07-02
highCVE-2026-11979: libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when …nvd · 2026-06-29
unknownCVE-2026-11979: Stack-Based Buffer Overflow in libxml2msrc · 2026-06-09