CVE-2021-27197 json
DSUtility.dll in Pelco Digital Sentry Server before 7.19.67 has an arbitrary file write vulnerability.
published 2021-02-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13962
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
DSUtility.dll in Pelco Digital Sentry Server before 7.19.67 has an arbitrary file write vulnerability. The AppendToTextFile method doesn't check if it's being called from the application or from a malicious user. The vulnerability is triggered when a remote attacker crafts an HTML page (e.g., with "OBJECT classid=" and "<SCRIPT language='vbscript'>") to overwrite arbitrary files.
Patch / fix
- pelco digital_sentry_server 7.19.67
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/vitorespf/Advisories/blob/master/Pelco_Digital_Sentry_Server_AFW.txt referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
| NVD | 2.0 | 8.8 | AV:N/AC:M/Au:N/C:N/I:C/A:C |
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/vitorespf/Advisories/blob/master/Pelco_Digital_Sentry_Server_AFW.txt
exploit, third-party-advisory
-
support.pelco.com
/s/article/What-is-the-Digital-Sentry-software-release-revision-history
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-27197
- NVD CVE-2021-27197
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