CVE Explorer
CVE-2026-7828
UltraVNC repeater through 1.8.2.2 contains an integer overflow in the HTTP request logging path. In repeater/webgui/settings.c:336, the win_log() function allocates list nodes via malloc(sizeof(struct LIST) + strlen(line)), where line is derived from HTTP request URIs. If strlen(line) is sufficiently large, the addition overflows to a value smaller than sizeof(struct LIST), causing a heap allocation smaller than required. The subsequent strcpy of the full string into the undersized allocation pr
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","modules":["repeater"],"product":"UltraVNC","vendor":"uvnc","versions":[{"lessThanOrEqual":"1.8.2.2","status":"affected","version":"0","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-190","description":"Integer Overflow or Wraparound","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"UltraVNC source repository","tags":["product"],"url":"https://github.com/ultravnc/UltraVNC"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/references/1
{"name":"UltraVNC project page","tags":["vendor-advisory"],"url":"https://uvnc.com/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/references/0
{"url":"https://www.securin.io/zero-days/cve-2026-7828-integer-overflow-win-log-malloc-ultravnc-repeater"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:df3e64f83d484773ef73692a305340b627542fe06a2a2bff137c5d8314c3a042 · sha256:c455cd6ca9bf1003… · /containers/cna/references/2
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.