CVE-2015-7755
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 allows remote attackers to obtain administrative access by entering an unspecified password during a (1) SSH or (2) TELNET session.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Juniper ScreenOS Improper Authentication Vulnerability.
- Added
- 2 Oct 2025
- Fix due (US federal)
- 23 Oct 2025
- Used by ransomware
- Not known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 61.1% · top 0.8% of all CVEs (4 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (12)
- http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/ (opens in a new tab)x_refsource_MISCx_transferred
- http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/ (opens in a new tab)x_refsource_MISCx_transferred
- 1034489 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- VU#640184 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/hdm/juniper-cve-2015-7755 (opens in a new tab)x_refsource_MISCx_transferred
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://twitter.com/cryptoron/statuses/677900647560253442 (opens in a new tab)x_refsource_MISCx_transferred
- https://adamcaudill.com/2015/12/17/much-ado-about-juniper/ (opens in a new tab)x_refsource_MISCx_transferred
- http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/ (opens in a new tab)x_refsource_MISCx_transferred
- 79626 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-7755 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2015-7755)Record last updated .