Router crash via unbounded SSID URL decoding
Published Oct 31, 2025 · Updated Oct 31, 2025
Stack overflow in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote attackers to crash the router via a crafted request. In sub_4232EC, urldecode writes an unbounded, attacker-controlled ssid value byte by byte into the 128-byte stack buffer v18. The network path requires no privileges or user interaction, and successful exploitation persistently interrupts router services.
Summary
What happened
Stack overflow in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote attackers to crash the router via a crafted request. In sub_4232EC, urldecode writes an unbounded, attacker-controlled ssid value byte by byte into the 128-byte stack buffer v18. The network path requires no privileges or user interaction, and successful exploitation persistently interrupts router services.
The record
- CVE
- CVE-2025-63463
- Published
- Oct 31, 2025
- Updated
- Oct 31, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 31, 2025CVE publishedPublication date reported by the CVE source.
- Oct 31, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- VulnbyCola LR350 stack-overflow reportproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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