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CVE-2025-60876: BusyBox wget thru 1.3.7 accepted raw CR (0x0D)/LF (0x0A) and other C0 control bytes in the HTTP request-target (path/query), allowing the request line to be split and attacker-controlled headers to be injected. To preserve the HTTP/1.1 request-line shape METHOD SP request-target SP HTTP/1.1, a raw space (0x20) in the request-target must also be rejected (clients should use %20).

criticalCVSS 9.4CVE-2025-60876

CSIRTS triage

What
Insufficient sanitization of HTTP request-target allows control characters to split request lines and inject attacker-controlled headers.
Who is affected
All deployments of BusyBox wget version 1.3.7 and earlier are vulnerable to HTTP header injection.
Urgency
Critical; active exploitation likely; HTTP header injection enables cache poisoning, request smuggling, and credential theft.
Action
Upgrade BusyBox wget immediately to version 1.35.0 or later.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.4
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-60876

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-60876coverage & exploitation statusNVD · CVE.org

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