CVE-2017-5135

CRITICAL

Technicolor DPC3928SL - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-5135. PoCs published by nixawk.

AI-analyzed exploit summary This exploit targets CVE-2017-5135 (StringBleed) in SNMP implementations, crafting malformed SNMP packets to trigger information leakage. It generates SNMP GetNextRequest PDUs with manipulated community strings and parses responses to extract sensitive data.

Description

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.

Exploits (1)

exploitdb WORKING POC
by nixawk · pythonremotehardware
https://www.exploit-db.com/exploits/43384

This exploit targets CVE-2017-5135 (StringBleed) in SNMP implementations, crafting malformed SNMP packets to trigger information leakage. It generates SNMP GetNextRequest PDUs with manipulated community strings and parses responses to extract sensitive data.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: SNMP implementations (e.g., Net-SNMP)
No auth needed
Prerequisites: Network access to target SNMP service · SNMP service running on target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Technical Description, Third Party Advisory x_refsource_misc
https://stringbleed.github.io/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/98092
Press/Media Coverage, Third Party Advisory x_refsource_misc
https://www.reddit.com/r/netsec/comments/67qt6u/cve_20175135_snmp_authentication_bypass/

Scores

CVSS v3 9.1
EPSS 0.1740
EPSS Percentile 96.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

Status published
Products (1)
technicolor/dpc3928sl_firmware d3928sl-p15-13-a386-c3420r55105-160127a
Published Apr 27, 2017
Tracked Since Feb 18, 2026