TP-Link TL-WR841N Authentication Bypass by Spoofing Vulnerability
TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR841N routers.…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)03 Sept 2025
- Exploited in EUVD (ENISA)03 Sept 2025
- Used by ransomwareno
- EPSS above 10 %20.0%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from improper authentication. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-19899.
Affected products
- V3
- V11
- V6
- V12
- patch: V12_230317
- V2
- V4
- V9
- V5
- V10
- V1
- RU V2
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
-
Exploitation reported (ENISA)
-
Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 20.0%
References
Other exploited vulnerabilities from the same vendor
- CVE-2025-9377TP-Link Archer C7(EU) and TL-WR841N/ND(MS) OS Command Injection Vulnerability6.5 · Background exploitation
- CVE-2020-24363TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability6.0 · Background exploitation
- CVE-2023-33538TP-Link Multiple Routers Command Injection Vulnerability6.6 · Background exploitation
- CVE-2023-1389TP-Link Archer AX-21 Command Injection Vulnerability8.3 · Background exploitation
- CVE-2015-3035TP-Link Multiple Archer Devices Directory Traversal Vulnerability7.9 · Background exploitation