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).
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.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
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.
- Low exploitation riskCVE-2025-608760.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-60876 | coverage & exploitation status | NVD · CVE.org |
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