🛡️ CVE-2023-43261 — ur32-firmware

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: None.

Weakness class

CVE-2023-43261 is classified as CWE-532: Insertion of Sensitive Information into Log File. Sensitive values are written to logs, which are typically kept longer and read more widely than the data warrants.

Affected software

CVE-2023-43261 is recorded against 5 packages.

• ur32-firmware (fixed in 35.3.0.7)
• ur32l-firmware (fixed in 35.3.0.7)
• ur35-firmware (fixed in 35.3.0.7)
• ur41-firmware (fixed in 35.3.0.7)
• ur5x-firmware (fixed in 35.3.0.7)

Timeline and source

Published on 4 October 2023 and last revised on 9 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

packetstormsecurity.com
github.com
medium.com
support.milesight-iot.com
packetstormsecurity.com
github.com
medium.com
support.milesight-iot.com

Other advisories for this package

ur32-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2023-43260 (6.1 Medium, published 5 Oct 2023)

Same weakness in other software

These advisories are the same class of weakness (CWE-532: Insertion of Sensitive Information into Log File) in other software:

• CVE-2026-65945 (6.5 Medium, published 10 Aug 2026)
• CVE-2026-46358 (published 7 Aug 2026)
• CVE-2026-0637 (4.4 Medium, published 6 Aug 2026)
• CVE-2026-20289 (5.7 Medium, published 5 Aug 2026)
• CVE-2026-44105 (6.6 Medium, published 30 Jul 2026)
• CVE-2026-59326 (3.3 Low, published 30 Jul 2026)
• CVE-2026-12947 (7.5 High, published 30 Jul 2026)
• CVE-2026-54704 (6.5 Medium, published 29 Jul 2026)

Details

Affected Packages

References