CVE-2000-0955

Cisco Virtual Central Office 4000 < 5.1.3 - Weak Encryption in SNMP MIB

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2000-0955. PoCs published by @stake.

AI-analyzed exploit summary This Perl script decrypts Cisco VCO/4K SNMP passwords by reversing a simple substitution cipher (XOR-like operation with 164). It requires prior retrieval of the obfuscated password (e.g., via read-only SNMP community string).

Description

Cisco Virtual Central Office 4000 (VCO/4K) uses weak encryption to store usernames and passwords in the SNMP MIB, which allows an attacker who knows the community name to crack the password and gain privileges.

Exploits (1)

exploitdb WORKING POC VERIFIED
by @stake · perlremotehardware
https://www.exploit-db.com/exploits/20372

This Perl script decrypts Cisco VCO/4K SNMP passwords by reversing a simple substitution cipher (XOR-like operation with 164). It requires prior retrieval of the obfuscated password (e.g., via read-only SNMP community string).

Classification
Working Poc 100%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Cisco Virtual Central Office 4000 (VCO/4K) <= 5.13
No auth needed
Prerequisites: Access to SNMP read-only community string to retrieve obfuscated passwords
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Patch, Vendor Advisory vendor-advisory x_refsource_atstake
http://www.atstake.com/research/advisories/2000/a102600-1.txt
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/1885
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/5425

Scores

EPSS 0.0184
EPSS Percentile 76.2%

Details

Status published
Products (1)
cisco/virtual_central_office_4000 < 5.1.3
Published Dec 19, 2000
Tracked Since Feb 18, 2026