CVE-2026-102812: TP-Link Systems RE305 v3 · Use of Hard-coded Cryptographic Key
Affects TP-Link Systems RE305 v3Source CVE Database V5
Not known to be exploited · CVSS 6.9 Medium : upgrade to 1.1.8 Build 20260921 Rel. 42853 when convenient.
Data as of 27 Oct 2026, 18:12 UTC
- Patch
- Available – fixed in 1.1.8 Build 20260921 Rel. 42853, 1.3.1 Build 20260821 Rel. 41256
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade RE305 v3 to 1.1.8 Build 20260921 Rel. 42853; Archer C7 v5 to 1.3.1 Build 20260821 Rel. 41256.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| TP-Link Systems Inc.RE305 v3 | Affected
| Fixed in
|
| TP-Link Systems Inc.Archer C7 v5 | Affected
| Fixed in
|
AI-suggested
Apply the official firmware updates to versions 1.1.8 Build 20260921 Rel. 42853 or 1.3.1 Build 20260821 Rel. 41256 or later, which contain fixes for this vulnerability. No other mitigation is indicated by the vendor advisory.
Description
CVE-2026-102812 is a vulnerability in TP-Link RE305 v3 and Archer C7 v5 devices where a hard-coded AES-128 cryptographic key and initialization vector are embedded in the firmware's configuration backup mechanism. This flaw allows an attacker who obtains a backup file to decrypt it and access sensitive configuration data such as administrator passwords and Wi-Fi credentials. The vulnerability has a medium severity with a CVSS 4.0 score of 6.9. Fixed versions 1.1.8 Build 20260921 Rel. 42853 and 1.3.1 Build 20260821 Rel. 41256 address this issue.
References
- tp-link.com/us/support/download/re305/v3/ (opens in a new tab)
- tp-link.com/en/support/download/re305/v3/ (opens in a new tab)
- tp-link.com/en/support/download/archer-c7/v5/ (opens in a new tab)
- tp-link.com/us/support/download/archer-c7/v5/ (opens in a new tab)
- tp-link.com/us/support/faq/5362/ (opens in a new tab)