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NVD / CVE Program· CNA Citrix

CVE-2025-7775: Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service

Noroxi assessment

Priority: This week (action score 72/100)

  • CISA has confirmed exploitation in the wild (Aug 26, 2025). Remediation deadline for US federal agencies: Aug 28, 2025.
  • Probability of exploitation in the next 30 days: 20.6% (FIRST EPSS); higher than 97.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: NetScaler ADC 37.241, 47.48, 55.330; NetScaler Gateway 37.241, 47.48, 55.330.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Upgrade to NetScaler ADC 37.241, 47.48, 55.330; NetScaler Gateway 37.241, 47.48, 55.330 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX

CriticalCVSS 9.2 · v4.0KEVWeaponized Fix available
Published
Aug 26, 2025
Updated
Jun 17, 2026
EPSS
20.6% · 97th percentile

Report tools

JSON

Action score

72

This week

Don’t wait for the next maintenance window.

CVSS
36 / 40 · 9.2 / 10
CISA KEV
30 / 30 · Listed
EPSS
6 / 30 · 20.6%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Citrix
9.2
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Aug 26, 2025. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Aug 28, 2025.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-7775

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
citrixnetscaler application delivery controller
citrixnetscaler gateway

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • citrix netscaler gateway13.1 and later · before 13.1-59.22
  • citrix netscaler gateway14.1 and later · before 14.1-47.48

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Citrix). Independent of NVD's CPE analysis and usually ahead of it.

  • NetScaler ADC

    • 14.1 and later · before 47.48affected · patch
    • 13.1 and later · before 59.22affected · patch
    • 13.1 FIPS and NDcPP and later · before 37.241affected · patch
    • 12.1 FIPS and NDcPP and later · before 55.330affected · patch

  • NetScaler Gateway

    • 14.1 and later · before 47.48affected · patch
    • 13.1 and later · before 59.22affected · patch
    • 13.1 FIPS and NDcPP and later · before 37.241affected · patch
    • 12.1 FIPS and NDcPP and later · before 55.330affected · patch

Same product

citrix: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-3519Unauthenticated remote code executionKEV
    99Now
  • CVE-2025-5777NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overreadKEV
    97Now
  • CVE-2026-3055Insufficient input validation leading to memory overreadKEV
    94Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-5349Jun 17, 2025 · NetScaler ADC and NetScaler Gateway - Improper access control on the NetScaler Management Interface
    36Monitor
  • ← EarlierCVE-2025-6543Jun 25, 2025 · Memory overflow vulnerability leading to unintended control flow and Denial of ServiceKEV
    69This week
  • Later →CVE-2025-7776Aug 26, 2025 · Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
    38Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
NetScaler ADC37.241Vendor (CNA)
NetScaler ADC47.48Vendor (CNA)
NetScaler ADC55.330Vendor (CNA)
NetScaler ADC59.22Vendor (CNA)
NetScaler Gateway37.241Vendor (CNA)
NetScaler Gateway47.48Vendor (CNA)
NetScaler Gateway55.330Vendor (CNA)
NetScaler Gateway59.22Vendor (CNA)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×4

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:42025-08-28
Proof-of-concept repository on GitHubstars:02025-08-30
Proof-of-concept repository on GitHubstars:22025-08-31
Proof-of-concept repository on GitHubstars:12025-09-02

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.

  1. CISA KEVsame day
  2. Published
  3. First PoC+2 d
  4. TodayOct 27, 2026+427 d
EPSS, last 120 days

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 researchers

Finders, 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.

  • CVE-2026-88772397 days apartMemory overflow vulnerability leading to Remote Code Execution or Denial of ServiceKEV
    91Now
  • CVE-2025-654362 days apartMemory overflow vulnerability leading to unintended control flow and Denial of ServiceKEV
    69This week
  • CVE-2026-88779404 days apartMemory overflow vulnerability leading to Denial of ServiceKEV
    67This week
  • CVE-2026-8452308 days apartMemory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of ServiceKEV
    65This week
  • CVE-2025-77760 days apartMemory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
    38Monitor
  • CVE-2026-8655308 days apartMultiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service
    35Monitor

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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/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:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records