CVE-2026-88777: Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service
Citrix NetScaler · ADC
Vendor fix available · Affected: Citrix NetScaler ADC · Exploitation: public proof of concept (unverified)
ExploitationProof of concept public
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public1 public GitHub repository (unverified), listed by PoC-in-GitHub23 Oct
- Not established: not seen
Higher than 54% of scored CVEs
Not scored yet. NVD has not published a CVSS score.
DescriptionNVD
Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to unpredictable or erroneous behavior or Denial of Service
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Citrix NetScaler
- Published
- September 2026
What changed
- PoC-in-GitHub lists 1 public GitHub repository (unverified) PoC-in-GitHub
Coverage2 articles · 2 outlets
One row per outlet, in order of first report. First in our coverage: Infosecurity, 28 Sep.
- Mon 28 Sep, 08:35 UTC. Infosecurity, first report. Citrix NetScaler Zero Days Exploited in Attacks, Patch Now.
- Mon 28 Sep, 12:07 UTC. Rapid7, its first report on the story. Citrix NetScaler Zero Days Expose Appliances to Active RCE Attacks.
- First report
- Article
- Running total
Show as tableHide table
| Published (UTC) | Outlet | Headline |
|---|---|---|
| 28 Sep 08:35 | Infosecurity | Citrix NetScaler Zero Days Exploited in Attacks, Patch Now |
| 28 Sep 12:07 | Rapid7 | Citrix NetScaler Zero Days Expose Appliances to Active RCE Attacks |
- Citrix NetScaler Zero Days Expose Appliances to Active RCE AttacksRapid7 · mentions it in passing
- Citrix NetScaler Zero Days Exploited in Attacks, Patch NowInfosecurity · first in our coverage · mentions it in passing
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