CVE-2017-5135

Certain Technicolor devices have an SNMP access-control bypass, possibly involving an ISP customization in some cases. The Technicolor (formerly Cisco) DPC3928SL with firmware D3928SL-P15-13-A386-c3420r55105-160127a could be reached by any SNMP community string from the Internet; also, you can write in the MIB because it provides write properties, aka Stringbleed. NOTE: the string-bleed/StringBleed-CVE-2017-5135 GitHub repository is not a valid reference as of 2017-04-27; it contains Trojan horse code purported to exploit this vulnerability.

• http://www.securityfocus.com/bid/98092Third Party Advisory, VDB Entry
• https://stringbleed.github.io/Technical Description, Third Party Advisory
• https://www.reddit.com/r/netsec/comments/67qt6u/cve_20175135_snmp_authentication_bypass/Press/Media Coverage, Third Party Advisory
• http://www.securityfocus.com/bid/98092Third Party Advisory, VDB Entry
• https://stringbleed.github.io/Technical Description, Third Party Advisory
• https://www.reddit.com/r/netsec/comments/67qt6u/cve_20175135_snmp_authentication_bypass/Press/Media Coverage, Third Party Advisory

Published

Apr 27, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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