BeyondTrust Remote Support: attackers can get in without a password
OFFICIAL NAME: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
WHAT IT IS · REMOTE SUPPORT OR IT MANAGEMENTIt controls many computers at once, so one break-in can reach all of them.
DO THIS FIRSTPatch it today, or ask your IT provider if they run it for you. Not sure if you use it? Send this page to your IT provider or security lead and ask.
TECHNICAL SUMMARY BeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance.
WHY THIS VERDICT Attacks are confirmed. The vulnerability is 26 days old, so many systems are likely still unpatched. Ready-made attack tools are public. It affects a product that faces the internet or gives remote access. The severity score is critical (9.3). The exploit prediction score is 78%.
WHY IT RANKS HERE Exploitation is confirmed by an authoritative source. The product faces the internet or gives remote access. Ready-made attack tools are public.
- HIGHEST CONFIRMED RUNG
- EXPLOITED
- CISA KEV
- LISTED
- EXPLOIT CODE
- READY TO USE
How far has it climbed?
01 TALK
■ CONFIRMEDNEWEST EVIDENCE · 2 INDEPENDENT SOURCESCVE-2026-102764 discussed publicly (CIRCL sighting). CVE-2026-102764 discussed publicly (CIRCL sighting).
02 EXPOSED
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETWe have no source that counts exposed systems yet. Internet scan data needs a partnership we do not have. No evidence here does not mean nothing is exposed.
03 TRIED
■ CONFIRMEDNEWEST EVIDENCE · 2 INDEPENDENT SOURCESAttacks that worked are confirmed (step 4), so attempts count as confirmed too.
04 EXPLOITED
■ CONFIRMEDNEWEST EVIDENCE · 2 INDEPENDENT SOURCESBeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance. CISA Vulnrichment marks CVE-2026-102764 as actively exploited.
05 DAMAGE
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETBreach notices and filings rarely name the flaw that was used, so we cannot link them to this event yet. No evidence here does not mean no harm.
When each thing happened
- DISCLOSED
- EXPLOIT CODE PUBLIC
- FIRST ATTACK REPORT
- CISA KEV LISTING
- US FEDERAL DEADLINE
THE FIX
CISA's instruction: apply the vendor's fix, or stop using the product if no fix exists. The deadline CISA set for US federal agencies, Oct 19, 2026, has passed. It is a US government deadline; use it as a guide.
Questions to ask this week
- Do we run BeyondTrust Remote Support? If yes, is it patched or cut off from the internet?
- Who owns fixing it, and by what date?
- Have we checked for signs of attack since the first report, not just since the patch?
How it unfolded
- Attack activity. OCT 15, 2026CISA Vulnrichment marks CVE-2026-102764 as actively exploited
- Attack activity. OCT 15, 2026BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability
- OCT 16, 2026AL26-025 - Critical vulnerability impacting BeyondTrust Remote Support – CVE-2026-102764
- OCT 16, 2026BeyondTrust security advisory (AV26-1054) – Update 1
- OCT 16, 20263 public GitHub repositories claim a proof of concept for CVE-2026-102764
- OCT 28, 2026CVE-2026-102764 discussed publicly (CIRCL sighting) (13 reports, latest NOV 5)
- NOV 1, 2026Public proof of concept for CVE-2026-102764 (CIRCL sighting) (4 reports, latest NOV 4)
- NOV 2, 2026Vulnerability CVE-2026-102764 confirmed by a researcher (CIRCL sighting)
SOURCES
- [1] nuclei-templates: Nuclei scan template: BeyondTrust Remote Support <= 26.2.3 - Origin Validation File Upload, NOV 2
- [2] CIRCL Vulnerability-Lookup sightings: CVE-2026-102764 discussed publicly (CIRCL sighting), NOV 5
- [3] CIRCL Vulnerability-Lookup sightings: Public proof of concept for CVE-2026-102764 (CIRCL sighting), NOV 4
- [4] CIRCL Vulnerability-Lookup sightings: Vulnerability CVE-2026-102764 confirmed by a researcher (CIRCL sighting), NOV 2
- [5] PoC-in-GitHub: 3 public GitHub repositories claim a proof of concept for CVE-2026-102764, OCT 16
- [6] Canadian Centre for Cyber Security: BeyondTrust security advisory (AV26-1054) – Update 1, OCT 16
- [7] Canadian Centre for Cyber Security: AL26-025 - Critical vulnerability impacting BeyondTrust Remote Support – CVE-2026-102764, OCT 16
- [8] CISA Known Exploited Vulnerabilities: BeyondTrust Remote Support Authentication Bypass by Spoofing Vulnerability, OCT 15
- [9] CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2026-102764 as actively exploited, OCT 15
- [10] CIRCL Vulnerability-Lookup sightings: 13 more reports