What’s Vulnerable › Vulnerabilities

CVE-2025-6982: Hardcoded DES Decryption Keys in TP-Link Archer C50 V3/V4/V5 and C20 V5

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-16 · updated 2026-06-17
• Weakness: CWE-798

Description

Use of Hard-coded Credentials in TP-Link Archer C50 V3( <= 180703)/V4( <= 250117 )/V5( <= 200407 ), and C20 V5 (<US_V5_260419 or <EU_V5_260317) allows attackers to decrypt the config.xml files.

Affected products

• TP-Link Systems Inc. Archer C20 v5: before US_V5_260419; before EU_V5_260317 — fixed in EU_V5_260317, US_V5_260419
• TP-Link Systems Inc. Archer C50 V3: through 180703
• TP-Link Systems Inc. Archer C50 V4: through 250117
• TP-Link Systems Inc. Archer C50 V5: through 200407

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Archer C20 v5 EU_V5_260317, US_V5_260419. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/archer-c20/v5/#Firmware
• https://www.tp-link.com/us/support/download/archer-c20/v5/#Firmware
• https://www.tp-link.com/us/support/faq/4538/
• https://www.kb.cert.org/vuls/id/554637

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