CVE-2023-26258 in the critical feed json
Arcserve UDP through 9.0.6034 allows authentication bypass.
published 2023-07-03 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-30082
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 40.0%
- EPSS 40.0% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
Arcserve UDP through 9.0.6034 allows authentication bypass. The method getVersionInfo at WebServiceImpl/services/FlashServiceImpl leaks the AuthUUID token. This token can be used at /WebServiceImpl/services/VirtualStandbyServiceImpl to obtain a valid session. This session can be used to execute any task as administrator.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 23 mo ago
Exploit prediction
40.03% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Arcserve UDP <= 9.0.6034 - Authentication Bypass nuclei detection template
- mdsec.co.uk https://www.mdsec.co.uk/2023/06/cve-2023-26258-remote-code-execution-in-arcserve-udp-backup/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
mdsec.co.uk
/2023/06/cve-2023-26258-remote-code-execution-in-arcserve-udp-backup/
exploit, technical-description, third-party-advisory
-
arcserve.com
/products/arcserve-udp
product
- support.arcserve.com /s/article/KB000015720?language=en_US
Sources
- CVE List CVE-2023-26258
- NVD CVE-2023-26258
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