CVE-2025-12781
An attacker can exploit a vulnerability in CPython regarding Base64 data to conduct an unspecified attack.
CSIRTS triage
- What
- A vulnerability allows an attacker to conduct an unspecified attack regarding Base64 data.
- Who is affected
- Deployments of CPython are affected.
- Urgency
- Remediation is low urgency as the attack is unspecified.
- Action
- Consider updating to the latest version of CPython.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.
Advisory coverage (2)
- low[UPDATE] [low] CPython: Vulnerability allows unspecified attackcert-bund · 2026-07-10
- high[NEW] [high] Dell PowerProtect Data Domain: Multiple vulnerabilitiescert-bund · 2026-07-09
External references
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[](https://www.csirts.com/cve/CVE-2025-12781)