CVE-2026-25512

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 18.5%, top 3% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 19%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, there is a remote code execution (RCE) vulnerability in Group-Office. The endpoint email/message/tnefAttachmentFromTempFile directly concatenates the user-controlled parameter tmp_file into an exec() call. By injecting shell metacharacters into tmp_file, an authenticated attacker can execute arbitrary system commands on the server. This issue has been patched in versions 6.8.150, 25.0.82, and 26.0.5.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
71(Attend)
EG Risk 71/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
19%
EPSS %ILE
97%
KEV
Not listed

Published

February 4, 2026

Last Modified

June 17, 2026

References (3)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-28 15:36 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 14:54 UTCEPSS rescore
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  9. 2026-07-23 03:07 UTCEG score recompute
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  25. 2026-07-13 07:38 UTCOSV refresh
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  1. 2026-07-13 06:13 UTCEPSS rescore
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  9. 2026-07-07 13:46 UTCEPSS rescore
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  19. 2026-06-28 14:07 UTCEPSS rescore
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  21. 2026-06-28 04:56 UTCEPSS rescore
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  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-25 13:49 UTCEPSS rescore
  26. 2026-06-24 22:01 UTCOSV refresh
  27. 2026-06-24 14:05 UTCEPSS rescore
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  46. 2026-06-11 14:00 UTCEPSS rescore
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  49. 2026-06-10 13:22 UTCEPSS rescore
  50. 2026-06-08 14:17 UTCEPSS rescore
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  52. 2026-06-07 15:25 UTCEPSS rescore
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  55. 2026-06-06 13:47 UTCEPSS rescore
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  59. 2026-06-05 06:10 UTCEPSS rescore
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  61. 2026-06-04 13:12 UTCEPSS rescore
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  63. 2026-06-02 20:13 UTCEPSS rescore
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  65. 2026-06-01 13:51 UTCEPSS rescore
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  67. 2026-05-31 00:16 UTCEPSS rescore
  68. 2026-05-31 00:16 UTCEPSS rescore
  69. 2026-05-29 14:35 UTCEG score recompute
  70. 2026-05-29 13:44 UTCEPSS rescore
  71. 2026-05-29 13:44 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-25512.yaml
    First seen Jan 1, 2026

    Group-Office < 26.0.5 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-25512?
CVE-2026-25512 is a high vulnerability published on February 4, 2026. Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.150, 25.0.82, and 26.0.5, there is a remote code execution (RCE) vulnerability in Group-Office. The endpoint email/message/tnefAttachmentFromTempFile directly concatenates the user-controlled…
When was CVE-2026-25512 disclosed?
CVE-2026-25512 was first published in the National Vulnerability Database on February 4, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-25512 actively exploited?
CVE-2026-25512 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19% probability of exploitation in the next 30 days, which ranks it in the top 3.0% of all scored CVEs.
What is the CVSS score of CVE-2026-25512?
CVE-2026-25512 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-25512?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25512, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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