CVE-2021-3047
4.2 MEDIUMA cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface
Published: 2021-08-11 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 4.2 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
- CWE
- CWE-338
Affected products
| Vendor | Product |
|---|---|
| paloaltonetworks | pan-os |
Description
A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3047
- [Vendor advisory]https://security.paloaltonetworks.com/CVE-2021-3047
- [Vendor advisory]https://security.paloaltonetworks.com/CVE-2021-3047
Related CVEs
Same vendor
- CVE-2026-0257 — Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker ... (9.1 CRITICAL)
- CVE-2025-0130 — A missing exception check in Palo Alto Networks PAN-OS® software with the web proxy feature enabled allows an unauthenticated attacker to... (7.5 HIGH)
- CVE-2021-3057 — A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a man-in-the-middle attacker ... (8.1 HIGH)
- CVE-2021-3055 — An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an au... (6.5 MEDIUM)
- CVE-2021-3054 — A time-of-check to time-of-use (TOCTOU) race condition vulnerability in the Palo Alto Networks PAN-OS web interface enables an authentica... (7.2 HIGH)
Same CWE
- CVE-2026-11832 — Dancer2::Plugin::Auth::OAuth versions before 0.22 for Perl default to a predictable nonce (9.1 CRITICAL)
- CVE-2026-9638 — Crypt::PBKDF2 versions before 0.261630 for Perl generate insecure random values for salts (7.5 HIGH)
- CVE-2026-46493 — HAX CMS helps manage microsite universe with PHP or NodeJs backends (7.5 HIGH)
- CVE-2026-11347 — The linqi application contains hardcoded cryptographic keys
- CVE-2026-41858 — Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH-Ecosystem / windows-utilities-release allows a... (7.5 HIGH)