CVE-2024-12356
CVE-2024-12356 is a security flaw in BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS), remote-support software IT providers use to manage their customers’ computers. Attackers can run commands on BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 19 Dec 2024.[1]
BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. BeyondTrust has published a fix or advice.
Description
CISA calls it a command injection in BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS). In its words: “BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) contain a command injection vulnerability, which can allow an unauthenticated attacker to inject commands that are run as a site user.”[1]
The underlying weakness is command injection (CWE-77), in MITRE’s list of common software weaknesses.[2]
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; BeyondTrust’s advisory has them[3]. CISA names the product as BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS).
Most families won’t have BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS); it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 19 Dec 2024, 2 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 27 Dec 2024 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 87%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
BeyondTrust has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.”[1]
- Check whether you use it.BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 27 Dec 2024 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 87%.[4] |
See also
Other BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) flaws
- CVE-2024-12686: OS command injection ·
Other BeyondTrust flaws
- CVE-2026-102764, BeyondTrust Remote Support: authentication bypass by spoofing ·
- CVE-2026-1731, BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA): OS command injection ·
Other command injection flaws
- CVE-2026-105134, AhsayCBS: command injection ·
- CVE-2026-96951, Microsoft Windows: command injection ·
- CVE-2016-3081, Apache Struts: command injection ·
- CVE-2026-8037, Progress LoadMaster: command injection ·
- CVE-2025-29635, D-Link DIR-823X: command injection ·
Every BeyondTrust flaw on CISA’s list · Everything added in December 2024
References
- ^ Cybersecurity and Infrastructure Security Agency. “BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS) Command Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 19 Dec 2024.
- ^ National Institute of Standards and Technology. “CVE-2024-12356 Detail”. National Vulnerability Database, published 17 Dec 2024.
- ^ BeyondTrust. Advisories and fixes: beyondtrust.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.874, percentile 99.8, 31 Oct 2026.
- CVE Program. “CVE-2024-12356”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.