VulnerabilityPublished 9 Aug 2024Updated 12 Aug 2024

CVE-2024-37826: serva · NULL Pointer Dereference

Affects servaSource CVE Database V5

Not known to be exploited · CVSS 7.5 High.

Data as of 26 Oct 2026, 12:54 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 1.2% chance of exploitation in 30 days – higher than 69% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Aug 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
GitHubvercot/serva`pkg:github/vercot/serva`Other threats	Affected =4.6.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Restrict network access to vercot Serva instances by implementing firewall rules or network segmentation to limit exposure to untrusted networks.
Monitor HTTP traffic to detect and block anomalous or malformed requests that could trigger the NULL pointer dereference.
Employ intrusion detection or prevention systems (IDS/IPS) with signatures or heuristics targeting suspicious HTTP requests against vercot Serva.
If possible, temporarily disable or limit the use of affected vercot Serva services until an official patch or update is released.
Engage with the vendor or community to obtain patches or updates as soon as they become available and apply them promptly.
Conduct regular backups and develop incident response plans to quickly recover from potential DoS incidents.
Review and harden application code or configurations if custom deployments or integrations exist to mitigate NULL pointer dereference risks.
Maintain up-to-date asset inventories to identify all instances of vercot Serva and prioritize remediation efforts accordingly.

Description

A NULL pointer dereference in vercot Serva v4.6.0 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Impact

The primary impact of CVE-2024-37826 is a Denial of Service condition, which can disrupt business operations by making the vercot Serva service unavailable. This can affect any organization relying on this software for critical network services, potentially causing downtime, loss of productivity, and service interruptions. Since the vulnerability can be exploited remotely without authentication, attackers can easily target exposed instances, increasing the risk of widespread disruption. While confidentiality and integrity are not directly impacted, the availability impact alone can have cascading effects, especially in environments where vercot Serva is part of essential infrastructure or supports critical applications. The lack of known exploits in the wild currently limits immediate widespread damage, but the vulnerability's characteristics suggest it could be weaponized quickly once exploit code is developed. Organizations in sectors such as telecommunications, enterprise IT, and critical infrastructure that use vercot Serva are particularly vulnerable. The potential for repeated or sustained DoS attacks could also lead to resource exhaustion and increased operational costs.

CWE-476NULL Pointer Dereference (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #13OWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product dereferences a pointer that it expects to be valid but is NULL.
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
Requirements
Select a programming language that is not susceptible to these issues.
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
OWASP ASVS 4.0.3
V11.1.7 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

gist.github.com/Evian-Zhang/4453e7ac0da7cfa421c76c5ab514dba4 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Feb 2026, 05:24 UTC

WeaknessesCWE-476

Technical details

References

Community reviews

Related threats