CVE-2015-7755
Confirmed PUBLISHEDJuniper 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...
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Dec 19, 2015
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 9.8 Critical
- EPSS
- 61.4%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| n/a |
n/a
|
n/a |
Affected |
CVE References
- VU#640184 kb.cert.org · Third-Party Advisory http://www.kb.cert.org/vuls/id/640184
- 1034489 securitytracker.com · VDB Entry http://www.securitytracker.com/id/1034489
- 79626 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/79626
- arstechnica.com/security/2015/12/unauthorized-code-in-junipe... arstechnica.com · CVE Record http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-...
- wired.com/2015/12/juniper-networks-hidden-backdoors-sh... wired.com · CVE Record http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-t...
Show 6 more references
- forums.juniper.net/t5/Security-Incident-Response/Important-Anno... forums.juniper.net · CVE Record https://forums.juniper.net/t5/Security-Incident-Response/Important-An...
- GitHub — hdm/juniper-cve-2015-7755 github.com · CVE Record https://github.com/hdm/juniper-cve-2015-7755
- kb.juniper.net/InfoCenter/index kb.juniper.net · CVE Record http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713
- twitter.com/cryptoron/statuses/677900647560253442 twitter.com · CVE Record http://twitter.com/cryptoron/statuses/677900647560253442
- adamcaudill.com/2015/12/17/much-ado-about-juniper adamcaudill.com · CVE Record https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
- forbes.com/sites/thomasbrewster/2015/12/18/juniper-says... forbes.com · CVE Record http://www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:41 UTC |
| CISA | 2026-06-02 14:05 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:C/I:C/A:C
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 13:30:37 UTC · CISA
Proof of concept available
Recorded 2016-01-09 22:49:07 UTC · GitHub
Weaknesses (CWE)
-
Improper Authentication
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2016-01-09 22:49:07 UTC · 2 stars
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:05 UTC about 1 month ago14:05 UTC · about 1 month ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:41 UTC about 2 months ago10:41 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
22:49 UTC over 10 years ago22:49 UTC · over 10 years ago
Public PoC available
Public proof-of-concept code published
-
11:00 UTC over 10 years ago11:00 UTC · over 10 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC almost 11 years ago00:00 UTC · almost 11 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2015-7755
{
"cve_id": "CVE-2015-7755",
"title": "Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r...",
"affected_vendor": "Juniper Networks",
"affected_product": "ScreenOS",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": 0.614,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}