A heap overflow vulnerability in Citrix NetScaler Gateway versions 10.1 before 135.8/135.12, 10.5 before 65.11, 11.0 before 70.12, and 11.1
A heap overflow vulnerability in Citrix NetScaler Gateway versions 10.1 before 135.8/135.12, 10.5 before 65.11, 11.0 before 70.12, and 11.1 before 52.13 allows a remote authenticated attacker to run arbitrary commands via unspecified vectors.
Noroxi analysis
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We use this product, ask for help- Published
- Apr 13, 2017
- Updated
- Jun 16, 2026
- EPSS
- 4.9% · 92th percentile
- CWE
- CWE-119
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.9%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| citrix | netscaler gateway firmware | cpe:2.3:o:citrix:netscaler_gateway_firmware |
| citrix | netscaler gateway | cpe:2.3:h:citrix:netscaler_gateway |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- citrix netscaler gateway firmware10.1
- citrix netscaler gateway firmware10.5
- citrix netscaler gateway firmware11.0
- citrix netscaler gateway firmware11.1
Same product
citrix: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-6810Directory traversal vulnerability in NetScaler ADC 10.5, 11.0, 11.1, and 12.0, and NetScaler Gateway 10.5, 11.0, 11.1, and 12.0 allows remot31Monitor
- CVE-2019-12044A Buffer Overflow exists in Citrix NetScaler Gateway 10.5.x before 10.5.70.x, 11.1.x before 11.1.59.10, 12.0.x before 12.0.59.8, and 12.1.x 30Monitor
- CVE-2019-6485Citrix NetScaler Gateway 12.1 before build 50.31, 12.0 before build 60.9, 11.1 before build 60.14, 11.0 before build 72.17, and 10.5 before 24Monitor
- CVE-2018-18517Citrix NetScaler Gateway 10.5.x before 10.5.69.003, 11.1.x before 11.1.59.004, 12.0.x before 12.0.58.7, and 12.1.x before 12.1.49.1 has XSS.19Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
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Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/97626
- www.securitytracker.com/id/1038283
- support.citrix.com/article/CTX222657
Vendor advisories and official records. Exploit/PoC links are deliberately left out.