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TI-2026-04692 Aliases CVE-2026-5363GHSA-r35r-mrc6-xgfp

Use of weak cryptographic key in TP-Link Archer C7

Priority LOW 23CWE-326Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-326.

Summary

Inadequate Encryption Strength vulnerability in TP-Link Archer C7 v5 and v5.8 (uhttpd modules) allows Password Recovery Exploitation. The web interface encrypts the admin password client-side using RSA-1024 before sending it to the router during login.  An adjacent attacker with the ability to intercept network traffic could potentially perform a brute-force or factorization attack against the 1024-bit RSA key to recover the plaintext administrator password, leading to unauthorized access and compromise of the device configuration.  This issue affects Archer C7: through Build 20220715.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00091 0th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkArcher C7 v5 and v5.8up to Build 20220715—No fix listedCNA
  • Archer C7 v5 and v5.8 VendorTP-Link Affected up to Build 20220715 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:archer_c7_firmware:*:*:*:*:*:*:*:*before 1.2.1VulnerableTP-Link
cpe:2.3:h:tp-link:archer_c7:5.0:*:*:*:*:*:*:*5.0Running onTP-Link
cpe:2.3:h:tp-link:archer_c7:5.80:*:*:*:*:*:*:*5.80Running onTP-Link
  • cpe:2.3:o:tp-link:archer_c7_firmware:*:*:*:*:*:*:*:* Versions before 1.2.1 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:archer_c7:5.0:*:*:*:*:*:*:* Versions 5.0 Running on ·TP-Link
  • cpe:2.3:h:tp-link:archer_c7:5.80:*:*:*:*:*:*:* Versions 5.80 Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5363
  2. 2026-10-03 Alias added: GHSA-r35r-mrc6-xgfp

References

Other 1

  • TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
  • TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
  • TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
  • TI-2020-18081 A password-disclosure issue in the web interface on certain TP-Link devices allows a… CVSS 3.1CRITICAL 9.8
  • TI-2023-20381 OS command injection in TP-Link Archer C5 CVSS 3.1HIGH 8.0
  • TI-2023-02475 TP-Link Archer C7v2 GET Request Parameter denial of service CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences