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Veeam Backup & Replication 12.x authenticated domain-user deserialization RCE (CVSS 9.4); fixed 12.3.2.4854

cve · CVE-2026-44963

Coverage timeline
1
first 2026-06-10 → last 2026-06-14
Peak priority
notable
1 notable
Sources cited
2
2 hosts
Sections touched
1
trending-vulnerabilities
Co-occurring entities
1
see Related entities below
ATT&CK techniques
2
pinned v19.1 · see below

ATT&CK techniques

2 techniques observed across 1 entry — derived from entry metadata and body evidence, never asserted without a published entry behind it · pinned to MITRE ATT&CK v19.1 · compare on the matrix · Navigator layer (JSON)

Lateral Movement TA0008

T1210Exploitation of Remote Services×1

Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network. Exploitation of a software vulnerability occurs when an adversary takes advantage of a programming error in a program, service, or within the operating system software or kernel itself to execute adversary-controlled code. A common goal for post-compromise exploitation of remote services is for lateral movement to enable access to a remote system.

Evidence: 2026-06-10/cve-2026-44963-veeam-backup-replication-authenticated-domain · ATT&CK page ↗

Impact TA0040

T1486Data Encrypted for Impact×1

Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources. They can attempt to render stored data inaccessible by encrypting files or data on local and remote drives and withholding access to a decryption key. This may be done in order to extract monetary compensation from a victim in exchange for decryption or a decryption key (ransomware) or to render data permanently inaccessible in cases where the key is not saved or transmitted.

Evidence: 2026-06-10/cve-2026-44963-veeam-backup-replication-authenticated-domain · ATT&CK page ↗

Story timeline

  1. 2026-06-10CVE-2026-44963 — Veeam Backup & Replication: authenticated domain-user deserialization RCE on the backup server (CVSS 9.4)
    trending-vulnerabilities

Where this entity is cited

  • trending-vulnerabilities1

Source distribution

  • thehackernews.com1 (50%)
  • veeam.com1 (50%)

Co-occurring entities

Derived — referenced by the same focused operational entries (weekly summaries and report roundups don't count); ×N counts the shared entries.

Entries about Veeam Backup & Replication 12.x authenticated domain-user deserialization RCE (CVSS 9.4); fixed 12.3.2.4854 (1)

2026-06-10 · view entry permalink →

CVE-2026-44963 — Veeam Backup & Replication: authenticated domain-user deserialization RCE on the backup server (CVSS 9.4)

Veeam patched CVE-2026-44963 (CVSS v4 9.4, CWE-502) on 9 June: any authenticated domain user — no elevated Veeam privilege required — can execute code on the Backup Server when it is domain-joined; workgroup servers are unaffected (Veeam, 2026-06-09). It affects all v12 builds up to 12.3.2.4465 (fixed in 12.3.2.4854); v13.x is not affected. Reported by watchTowr's Sina Kheirkhah (The Hacker News, 2026-06-09). No ITW exploitation is confirmed, but backup infrastructure is a perennial pre-encryption ransomware target (Akira, Black Basta, LockBit have historically gone after Veeam first), so treat as urgent (T1210, T1486). Upgrade to 12.3.2.4854; where patching is blocked, Veeam's hardening guidance includes removing the backup server from the domain.

vulnerability10 Jun 05:00Zmulti-sourceOpen finding ↗