CVE-2021-20156 Security feature bypass in Trendnet AC2600 TEW-827DRU
Attackers can install malicious firmware on Trendnet routers due to missing signature validation, leading to full device compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20156?
CVE-2021-20156 is a medium-severity vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an improper access control configuration that could allow for a malicious firmware update. It is possible to manually install firmware that may be malicious in nature as there does not appear to be any signature validation done to determine if it is from a known and trusted source. This includes firmware updates that are done via the automated "check for updates" in the admin interface. If an attacker is able to masquerade as the update server, the device will not verify that the firmware updates downloaded are legitimate.
Weakness: CWE-347
Which versions are affected by CVE-2021-20156?
It affects 1 product.
Products include Trendnet Tew-827dru Firmware.
How do I fix CVE-2021-20156?
No fix has been published for CVE-2021-20156 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20156 being exploited?
There is no known exploitation of CVE-2021-20156 in the wild and no public exploit code.
Other vulnerabilities in Trendnet AC2600 TEW-827DRU
Sources
Also known as GHSA-6w2f-q3rq-jh8v.