# What is CVE-2024-5463? > CVE-2024-5463 is a medium-severity flaw (CVSS 6.5) in Bc500 Firmware from Synology, published on 4 June 2024. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.4%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.edgeprotect.io/what-is/cve-2024-5463 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **EdgeProtect risk score:** 25 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 6.5 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.4% (latest exploit-likelihood forecast) - **Published:** 4 June 2024 - **Record last updated:** 17 June 2026 - **Main product:** Bc500 Firmware from Synology - **Affected products:** 2 ## What is CVE-2024-5463? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can change some data and slow it down. ### The official description A vulnerability regarding buffer copy without checking the size of input ('Classic Buffer Overflow') has been found in the login component. This allows remote attackers to write specific files containing non-sensitive information and conduct limited denial-of-service attacks via unspecified vectors. This attack only affects the login service which will automatically restart. The following models with Synology Camera Firmware versions before 1.1.1-0383 may be affected: BC500 and TC500. ### What kind of flaw is it? - CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can change some data and slow it down Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L` ## Is CVE-2024-5463 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.4%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.4%, 0.4%, 0.4%, 0.4%, 0.4%, 0.4%, 0.4%. ### Timeline - 4 June 2024: Published - 17 June 2026: Record last updated ### How EdgeProtect ranks it CVE-2024-5463 scores **25 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: key context - Real threat activity around it: key context 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2024-5463? The published record lists 2 products. Versions are as published: "before 1.1.1-0383" means every version up to, but not including, 1.1.1-0383. - [Bc500 Firmware](https://www.edgeprotect.io/product/synology/bc500_firmware) by [Synology](https://www.edgeprotect.io/vendors/synology) (Operating system): before 1.1.1-0383 - [Tc500 Firmware](https://www.edgeprotect.io/product/synology/tc500_firmware) by [Synology](https://www.edgeprotect.io/vendors/synology) (Operating system): before 1.1.1-0383 ## How do I fix CVE-2024-5463? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? EdgeProtect can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [synology.com](https://www.synology.com/en-global/security/advisory/Synology_SA_24_07) (Vendor advisory) ## Questions ### What is CVE-2024-5463? CVE-2024-5463 is a medium-severity flaw in Bc500 Firmware from Synology, published on 4 June 2024. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can change some data and slow it down. ### How serious is CVE-2024-5463? It scores 6.5 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2024-5463 is 25 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2024-5463 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.4%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2024-5463 affect? For Bc500 Firmware from Synology: before 1.1.1-0383. The record lists 2 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2024-5463? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2024-5463 affect you? EdgeProtect keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.edgeprotect.io/register Book a demo: https://www.edgeprotect.io/contact