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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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0e7fb8686d37fcc4d3503e3f5f466dfc0a9c851c0e7232c30f301b8a7731e69e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-88","description":"CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"groupoffice","vendor":"Intermesh","versions":[{"status":"affected","version":">= 26.0.0, < 26.0.9"},{"status":"affected","version":">= 25.0.0, < 25.0.87"},{"status":"affected","version":"< 6.8.154"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"LOW","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-88","description":"CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-2rwh-9qp7-f92x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-2rwh-9qp7-f92x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6acb419edce30e7a060c3e85373a60972f796b14d74aea77ceaf2ef285a29f82 · sha256:9a4c7e75422edfcf… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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