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VulnerabilityPublished

CVE-2026-102812: TP-Link Systems RE305 v3 · Use of Hard-coded Cryptographic Key

Affects TP-Link Systems RE305 v3Source CVE Database V5

0

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

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
TP-Link Systems Inc.RE305 v3Affected
  • =0
Fixed in
  • 1.1.8 Build 20260921 Rel. 42853
TP-Link Systems Inc.Archer C7 v5Affected
  • =0
Fixed in
  • 1.3.1 Build 20260821 Rel. 41256

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

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