CVE-2026-76651Pre-Authentication Multipart Boundary Buffer Overflow in HTTP Service in TP-Link TL-WR841N
Updated under an hour ago ()
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It affects TP-Link System Inc. TL-WR841N v14. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A buffer overflow vulnerability exists in the embedded HTTP service in TL-WR841N v14 when processing multipart/form-data requests. Insufficient validation of an attacker-controlled boundary parameter may allow a remote unauthenticated attacker to submit a crafted request that corrupts memory by overwriting data beyond the bounds of an internal buffer. Successful exploitation may result in modification or corruption of process memory, potentially leading to undefined application behavior. Arbitrary code execution, information disclosure, and denial-of-service conditions have not been demonstrated.
- CVSS
- 5.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-120
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- TPLink
- NVD analysis
- Deferred
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
TP-Link System Inc. TL-WR841N v14 tp_link_system:tl_wr841n_v14 (from the name) | before TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478; before TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588 | CNA record |
References
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmwarepatch
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmwarepatch
- https://www.tp-link.com/us/support/faq/5270/vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.