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CVE-2026-102764

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in BeyondTrust Remote Support. For every flaw being used in attacks, see Exploited flaws; for BeyondTrust’s, see BeyondTrust flaws being used in attacks.

CVE-2026-102764 is a security flaw in BeyondTrust Remote Support, remote-support software IT providers use to manage their customers’ computers. Attackers can get into BeyondTrust Remote Support without a valid password. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 16 Oct 2026.[1]

BeyondTrust Remote Support 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 an authentication bypass by spoofing in BeyondTrust Remote Support. In its words: “BeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance.”[1]

The CVE record adds: “The vulnerability exists within internal components of BeyondTrust’s Remote Support product. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could allow an attacker to perform file operations on the appliance.”[2]

The underlying weakness is authentication bypass by spoofing (CWE-290), in MITRE’s list of common software weaknesses.

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 Remote Support.

Most families won’t have BeyondTrust Remote Support; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 16 Oct 2026, within a day of it being made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 19 Oct 2026 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 19%. That’s in the top 3% 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 in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes).”[1]

  1. Check whether you use it.BeyondTrust Remote Support 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.
  2. Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 19 Oct 2026 to fix it.
  3. 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

DateEvent
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 19%.[4]

See also

Other BeyondTrust flaws

  • CVE-2026-1731, BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA): OS command injection ·
  • CVE-2024-12686, BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS): OS command injection ·
  • CVE-2024-12356, BeyondTrust Privileged Remote Access (PRA) and Remote Support (RS): command injection ·

Other authentication bypass by spoofing flaws

  • CVE-2026-104935, Ivanti Connect Secure: authentication bypass by spoofing ·
  • CVE-2023-50224, TP-Link TL-WR841N: authentication bypass by spoofing ·
  • CVE-2024-54085, AMI MegaRAC SPx: authentication bypass by spoofing ·
  • CVE-2024-4358, Progress Telerik Report Server: authentication bypass by spoofing ·
  • CVE-2022-24112, Apache APISIX: authentication bypass ·

Added the same day

Every BeyondTrust flaw on CISA’s list · Everything added in October 2026

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability”. Known Exploited Vulnerabilities Catalog, added 16 Oct 2026.
  2. ^ National Institute of Standards and Technology. “CVE-2026-102764 Detail”. National Vulnerability Database, published 15 Oct 2026.
  3. ^ BeyondTrust. Advisories and fixes: beyondtrust.com, beyondtrust.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.190, percentile 97.3, 31 Oct 2026.
  5. CVE Program. “CVE-2026-102764”. 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.