CVE-2026-49000: Insecure Password Scheme Vulnerability

CVE-2026-49000 Overview

CVE-2026-49000 documents an insecure password scheme vulnerability disclosed through a ZTE security bulletin. The flaw stems from improper selection of encryption algorithms, inadequate key management, or flawed implementation of cryptographic routines. Conditions that trigger the weakness include hard-coded keys and the use of weak encryption algorithms. The issue is classified under [CWE-310] (Cryptographic Issues) and is exploitable over the network without authentication or user interaction. Successful exploitation can lead to disclosure or tampering of sensitive data protected by the affected scheme.

Critical Impact
Attackers with network access can recover or manipulate protected credentials and data due to weak cryptographic protections, undermining confidentiality and integrity controls.

Affected Products

Specific affected product versions are not enumerated in the NVD record
Refer to the ZTE Security Bulletin for the authoritative product and version list
Environments using the impacted password scheme are in scope

Discovery Timeline

2026-05-27 - CVE-2026-49000 published to NVD
2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-49000

Vulnerability Analysis

The vulnerability resides in the password handling scheme of the affected product. The implementation relies on cryptographic choices that fail modern security baselines, including potential use of hard-coded keys and weak algorithms. An attacker positioned on the network can target the scheme to recover plaintext credentials or alter protected values. The attack does not require prior authentication or user interaction, though exploitation complexity is elevated because the attacker must understand the specific cryptographic weakness and assemble a working attack chain.

Because cryptographic material may be static across deployments, a single recovered key can compromise multiple installations. Tampering with encrypted material can also enable downstream integrity attacks on authentication, configuration, or session data.

Root Cause

The root cause is improper cryptographic design and implementation. Contributing factors include hard-coded secrets embedded in binaries or configuration, use of deprecated or broken algorithms, and weak key derivation or management. These conditions map directly to [CWE-310] and violate accepted guidance such as NIST SP 800-131A on algorithm transitions.

Attack Vector

The attack vector is network-based. An attacker who can observe or interact with traffic protected by the weak scheme can recover keys, decrypt sensitive data, or forge integrity-protected values. No verified public exploit code is available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog. No public proof-of-concept is referenced in the available data; consult the ZTE Security Bulletin for vendor-specific technical detail.

Detection Methods for CVE-2026-49000

Indicators of Compromise

Unexpected decryption or modification of credential stores or configuration blobs
Authentication anomalies involving accounts whose secrets are protected by the affected scheme
Network captures showing repeated use of static initialization vectors or keys across sessions

Detection Strategies

Inventory cryptographic libraries and configurations to identify weak algorithms such as DES, RC4, MD5, or SHA-1 in password handling paths
Perform static analysis on firmware or binaries to locate hard-coded keys, certificates, or password material
Compare deployed product versions against the vendor advisory list and flag any matches for remediation tracking

Monitoring Recommendations

Log and review authentication failures, privilege changes, and configuration export operations on affected systems
Monitor management interfaces for unusual access patterns from untrusted network segments
Alert on bulk credential read operations or unexpected access to stored secret material

How to Mitigate CVE-2026-49000

Immediate Actions Required

Identify affected deployments by cross-referencing assets with the ZTE Security Bulletin
Restrict network reachability of management and authentication interfaces to trusted administrative networks
Rotate any credentials, keys, or certificates that may have been protected by the weak scheme

Patch Information

Apply the vendor-supplied fix referenced in the ZTE bulletin once available for the impacted product line. Validate that updated builds replace the insecure algorithm and remove any hard-coded key material. Re-issue affected secrets after patching, because installed credentials encrypted under the prior scheme remain exposed.

Workarounds

Place affected systems behind segmented management networks and require VPN or jump-host access
Disable or reconfigure features that depend on the weak password scheme until a patch is applied
Enforce strong, unique credentials and rotate them following any change to the cryptographic baseline