CVE-2026-33771
Juniper Ctp Operating System 9.2
Raw vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-33771 is a critical-severity Weak Password Requirements (CWE-521) vulnerability in Juniper Ctp Operating System. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Remote Services (T1021); ranked at the 31th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to IA-5 (Authenticator Management) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-33771 is a weak password requirements vulnerability in the password management function of Juniper Networks CTP OS. The password management menu allows administrators to configure password complexity requirements, but these settings are not saved persistently. This can be verified using the "Show password requirements" menu option, resulting in the enforcement of no or minimal complexity rules. Consequently, weak passwords can be set for local accounts, increasing the risk of brute-force or guessing attacks. The vulnerability affects CTP OS versions 9.2R1 and 9.2R2, with a CVSS v3.1 base score of 7.4 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) and is associated with CWE-521 (Weak Password Requirements).
An unauthenticated, network-based attacker can exploit this vulnerability by targeting local account passwords that fail to meet intended complexity standards. Due to the lack of enforced requirements, attackers may guess or brute-force these weak passwords over the network, potentially gaining unauthorized access to the device. Successful exploitation could enable full control of the affected CTP OS instance, compromising confidentiality and integrity of the system, though availability is not directly impacted.
The Juniper Networks security advisory at https://kb.juniper.net/JSA107864 details mitigation steps and available patches for this issue. Security practitioners should consult this advisory for version-specific upgrade guidance to address the persistent storage failure of password complexity settings.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-21193
Vulnerability Data
A Weak Password Requirements vulnerability in the password management function of Juniper Networks CTP OS might allow an unauthenticated, network-based attacker to exploit weak passwords of local accounts and potentially take full control of the device. The password management menu…
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enables the administrator to set password complexity requirements, but these settings are not saved. The issue can be verified with the menu option "Show password requirements". Failure to enforce the intended requirements can lead to weak passwords being used, which significantly increases the likelihood that an attacker can guess these and subsequently attain unauthorized access. This issue affects CTP OS versions 9.2R1 and 9.2R2.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 2 hardening rules · 1 OS baseline
V6.2.4V6.2.12V6.4.1
Mitigating Controls (NIST 800-53 r5) AI
IA-5 directly requires organizations to enforce strength, complexity, and change rules for passwords and other authenticators at issuance and reset.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Explicitly requires enforcing minimum password strength as part of authentication.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
A.5.17 mandates strong password requirements, so applying it to a system that previously lacked them removes the weakness by imposing the requirement.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (higher-evidence rows only; rows rated `none` are excluded).
RHEL 7 (2 rules)
- V-204424 The Red Hat Enterprise Linux operating system must not allow accounts configured with blank or null passwords. blocks CWE-521
- V-204425 The Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using an empty password. blocks CWE-521