PatchTheCVECVE-2020-29656: An information disclosure vulnerability exists in RT-AC88U Download Master before 3.1.0.108
CVE-2020-29656 is a high-severity flaw (CVSS 7.5) affecting rt-ac88u firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An information disclosure vulnerability exists in RT-AC88U Download Master before 3.1.0.108. A direct access to /downloadmaster/dm_apply.cgi?action_mode=initial&download_type=General&special_cgi=get_language makes it possible to reach "unknown functionality" in a "known to be easy" manner via an unspecified "public exploit."
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-425 |
| Published | 2020-12-09 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-29656?
rt-ac88u firmware: upgrade to 3.1.0.108. Exact commands for each OS are on this page.
Is CVE-2020-29656 being exploited?
CVE-2020-29656 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-29656 affect?
CVE-2020-29656 affects rt-ac88u firmware. Severity is high (CVSS 7.5). An information disclosure vulnerability exists in RT-AC88U Download Master before 3.1.0.108. A direct access to /downloadmaster/dm_apply.cgi?action_mode=initial&download_type=General&special_cgi=get_language makes it possible to reach "unkn
How urgent is CVE-2020-29656?
Priority 47/100. High severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2020-29655 HIGH 7.5 UPGRADE An injection vulnerability exists in RT-AC88U Download Master before 3.1.0.108
- CVE-2018-9285 CRITICAL 9.8 UPGRADE UPGRADE Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900,
- CVE-2018-18320 CRITICAL 9.8 UPGRADE UPGRADE An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices
- CVE-2018-18319 CRITICAL 9.8 UPGRADE UPGRADE An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices
- CVE-2017-11420 CRITICAL 9.8 UPGRADE UPGRADE Stack-based buffer overflow in ASUS_Discovery.c in networkmap in Asuswrt-Merlin firmware for ASUS devices and