Memory Overread Vulnerability in NetScaler Management Interface by Citrix
CVE-2025-5777

9.3CRITICAL

Key Information:

Vendor

Netscaler
Status
Adc
Gateway
Vendor
CVE Published:
17 June 2025

Badges

🔥 Trending now🥇 Trended No. 1📈 Trended📈 Score: 7,360💰 Ransomware👾 Exploit Exists🟡 Public PoC📰 News Worthy

What is CVE-2025-5777?

CVE-2025-5777 is a critical vulnerability identified in the NetScaler Management Interface, a product developed by Citrix that serves as an essential component for managing networking configurations, including secure gateway access for various applications. The vulnerability arises from insufficient input validation, which can lead to memory overread vulnerabilities when the NetScaler is configured as either a Gateway, such as for VPN or RDP Proxy services, or an AAA virtual server. This type of flaw poses significant risks as it could enable attackers to extract sensitive information from the memory, leading to potential exploitation of the system and unauthorized access to critical data, impacting the overall integrity and security of an organization’s network environment.

Potential impact of CVE-2025-5777

  1. Data Exposure: The memory overread vulnerability can expose sensitive data stored in memory, including authentication tokens, passwords, or other confidential information, leading to a higher risk of data breaches.

  2. Unauthorized Access: Exploiting this vulnerability may allow attackers to gain unauthorized access to the network and its resources, potentially compromising sensitive applications and data protected by the NetScaler interface.

  3. System Compromise: The ability to read memory contents may enable attackers to execute further exploits or enhance their control over affected systems, making it easier to deploy additional malware or ransomware, increasing the overall threat to the organization’s cybersecurity posture.

Affected Version(s)

ADC 14.1 < 43.56

ADC 13.1 < 58.32

Gateway 14.1 < 43.56

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-5777-CitrixBleed
Created by RickGeex

CVE-2025-5777
Created by idobarel

cve-2025-5777
Created by nocerainfosec

News Articles

favicon imageThe Hacker News

CISA Adds Four Critical Vulnerabilities to KEV Catalog Due to Active Exploitation

CISA adds four critical vulnerabilities to its KEV list, with active exploitation confirmed. Federal agencies must update by July 2025.

2 hours ago

favicon imageBleepingComputer

Public exploits released for CitrixBleed 2 NetScaler flaw, patch now

Researchers have released proof-of-concept (PoC) exploits for a critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed CitrixBleed2, warning that the flaw is easily exploitable and can successfully steal user session tokens.

8 hours ago

favicon imageGBHackers News

CitrixBleed 2 Vulnerability PoC Published - Experts Warn of Mass Exploitation Risk

A newly published proof-of-concept (PoC) for the critical CitrixBleed 2 vulnerability (CVE-2025-5777) has sent shockwaves through the cybersecurity community

1 day ago

References

https://support.citrix.com/support-home/kbsearch/article?...

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🥇

    Vulnerability reached the number 1 worldwide trending spot

  • 📈

    Vulnerability started trending

  • 🟡

    Public PoC available

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by GBHackers News

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-5777 : Memory Overread Vulnerability in NetScaler Management Interface by Citrix