CVE-2024-31963: Classic Buffer Overflow
Source CVE Database V5
Not known to be exploited · CVSS 6.4 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 2 May 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.
What to do
AI-suggested
To mitigate CVE-2024-31963, organizations should implement the following specific measures: 1) Monitor Mitel’s official channels for patches or firmware updates addressing this vulnerability and apply them promptly once available. 2) Restrict administrative and management access to affected devices using network segmentation, VPNs, and strong access controls to reduce the risk of authenticated attacker presence. 3) Enforce strong authentication mechanisms, including complex passwords and multi-factor authentication where supported, to prevent unauthorized access. 4) Regularly audit and monitor device logs and network traffic for unusual activity indicative of exploitation attempts. 5) Disable or limit unnecessary services and interfaces on the affected devices to reduce the attack surface. 6) Conduct internal security awareness and training to prevent credential compromise that could lead to authenticated attacks. 7) Consider deploying network intrusion detection/prevention systems (IDS/IPS) with signatures tuned to detect anomalous traffic patterns related to SIP phone exploitation. 8) Maintain an up-to-date asset inventory to quickly identify and remediate vulnerable devices. These targeted actions go beyond generic advice by focusing on access control, monitoring, and proactive patch management tailored to the nature of this vulnerability.
Description
A vulnerability on Mitel 6800 Series and 6900 Series SIP Phones through 6.3 SP3 HF4, 6900w Series SIP Phone through 6.3.3, and 6970 Conference Unit through 5.1.1 SP8 allows an authenticated attacker to conduct a buffer overflow attack due to insufficient bounds checking and input sanitization. A successful exploit could allow an attacker to gain access to sensitive information, modify system configuration or execute arbitrary commands within the context of the system.