CVE-2026-27947
CVE-2026-27947 is a high-severity vulnerability in Intermesh Group-office with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-88.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 9.4
- EPSS exploit prediction: 1% (50th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-9060
- Weakness: CWE-88
- Affected product: Intermesh Group-office
- Published:
- Last modified:
Description
Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.9, 25.0.87, and 6.8.154 have an authenticated Remote Code Execution vulnerability in the TNEF attachment processing flow. The vulnerable path extracts attacker-controlled files from `winmail.dat` and then invokes `zip` with a shell wildcard (`*`). Because extracted filenames are attacker-controlled, they can be interpreted as `zip` options and lead to arbitrary command execution. Versions 26.0.9, 25.0.87, and 6.8.154 fix the issue.
Frequently asked questions
- What is CVE-2026-27947?
- Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.9, 25.0.87, and 6.8.154 have an authenticated Remote Code Execution vulnerability in the TNEF attachment processing flow. The vulnerable path extracts attacker-controlled files from `winmail.dat` and then invokes `zip` with a shell wildcard (`*`). Because extracted filenames are attacker-controlled, they can be interpreted as `zip` options and lead to arbitrary command execution. Versions 26.0.9, 25.0.87, and 6.8.154 fix the issue.
- How severe is CVE-2026-27947?
- CVE-2026-27947 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-27947 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-27947?
- CVE-2026-27947 affects Intermesh Group-office. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-27947?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-27947 have an EU (EUVD) identifier?
- Yes. CVE-2026-27947 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9060.
- When was CVE-2026-27947 published?
- CVE-2026-27947 was published on 2026-02-27 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*
More vulnerabilities in Intermesh Group-office
- CVE-2026-34838 — Critical (CVSS 9.9): Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.156, 25.0.90,…
- CVE-2026-33755 — High (CVSS 8.8): Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.158, 25.0.92,…
- CVE-2026-27832 — High (CVSS 8.8): Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.8, 25.0.87,…
- CVE-2010-3428 — High (CVSS 7.5): SQL injection vulnerability in modules/notes/json.php in Intermesh Group-Office 3.5.9 allows remote attackers to…
- CVE-2026-30238 — Medium (CVSS 6.1): Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88,…
- CVE-2026-30237 — Medium (CVSS 6.1): Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.155, 25.0.88,…
All CVEs affecting Intermesh Group-office →
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